# Multiple choice questions on motion under gravity

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Multiple choice questions on motion under gravity. The laws of motion under gravity govern how objects move in response to the forces of gravity. While the basic principles of motion under gravity are well understood, there are still a number of complexities and nuances that make the topic a challenging subject to master. To help students understand and apply the concepts of motion under gravity, there are a number of multiple-choice questions available.

This blog post offers a comprehensive overview of these types of questions, focusing on the key concepts and principles that they help to illustrate. With an understanding of the fundamentals of motion under gravity, students can better prepare for exams and quizzes. So, let’s take a closer look at multiple-choice questions on motion under gravity, and see how they can help students gain a better grasp of the subject.

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## Multiple choice questions on motion under gravity

Motion under gravity

Q1. Who gave the theory of gravity?

(a) Charles Newton

(b) Charles Babbage

(c) Isaac Newton

(d) John Adams

(c) Isaac Newton

Q2. Astronauts in space can not stand erect. This is because

(a) There is no gravity

(b) Viscous forces of the atmosphere are very strong

(c) Solar wind exert an upward force

(d) Atmospheric pressure is very low

(a) There is no gravity

Q3. What is the force that governs gravity?

a) Nuclear force

b) Electromagnetic force

c) Strong force

d) Gravitational force

d) Gravitational force

Q4. What is the relationship between mass and gravitational force?

a) Gravitational force is directly proportional to mass

b) Gravitational force is inversely proportional to mass

c) Gravitational force is not affected by mass

d) None of the above

a) Gravitational force is directly proportional to mass

Q5. What is the shape of the orbit of planets around the Sun?

a) Circular

b) Elliptical

c) Spiral

d) Parabolic

d) Parabolic

Q6. What is the escape velocity?

a) The velocity required to move an object from one point to another

b) The velocity required to lift an object off the ground

c) The velocity required to escape the gravitational pull of an object

d) None of the above

c) The velocity required to escape the gravitational pull of an object

Q7. What is the relationship between distance and gravitational force?

a) Gravitational force is directly proportional to distance

b) Gravitational force is inversely proportional to distance

c) Gravitational force is not affected by distance

d) None of the above

b) Gravitational force is inversely proportional to distance

Q8. What is the term for the phenomenon where light bends due to gravity?

a) Reflection

b) Refraction

c) Diffraction

d) Gravitational lensing

d) Gravitational lensing

Q9. What is the theory that describes gravity in terms of the curvature of spacetime?

a) Quantum mechanics

b) General relativity

c) Special relativity

d) String theory

b) General relativity

Q10. What is the relationship between distance and orbital period for a planet?

a) Orbital period is directly proportional to distance

b) Orbital period is inversely proportional to distance

c) Orbital period is not affected by distance

d) None of the above

b) Orbital period is inversely proportional to distance

Q11. What is the force that causes tides on Earth?

a) Electromagnetic force

b) Nuclear force

c) Gravitational force

d) Strong force

c) Gravitational force

Q12. What is the term for the force that opposes the motion of an object through a fluid?

a) Air resistance

b) Friction

c) Drag force

d) Tension

c) Drag force

Q13. Which planet has the strongest gravitational field in our solar system?

a) Jupiter

b) Earth

c) Neptune

d) Saturn

a) Jupiter

Q14. What is the term for the phenomenon where time appears to slow down in a gravitational field?

a) Time dilation

b) Time distortion

c) Time reversal

d) Time asymmetry

a) Time dilation

Q15. What is the name of the spacecraft launched by NASA in 2011 to study the gravity field of the Earth?

a) Gravity Probe B

b) Gravity Recovery and Climate Experiment (GRACE)

c) Gravity Field and Steady-State Ocean Circulation Explorer (GOCE)

d) Gravity and Extreme Magnetism Small Explorer (GEMS)

Answer: c) Gravity Field and Steady-State Ocean Circulation Explorer (GOCE)

c) Gravity Field and Steady-State Ocean Circulation Explorer(GOCE)

Q16. Which planet is known as the “Red Planet”?

a) Venus

b) Mars

c) Saturn

d) Jupiter

b) Mars

Q17. Which planet has the shortest day in our solar system?

a) Venus

b) Mercury

c) Mars

d) Saturn

a) Venus

Q18. A stone is dropped from a tower. Which of the following is true about its motion under gravity?

a) The stone falls with a constant velocity

b) The stone falls with an increasing velocity

c) The stone falls with a decreasing velocity

d) The stone does not fall under gravity

b) The stone falls with an increasing velocity

Q19. Which of the following is not a factor affecting the motion of an object under gravity?

a) Mass of the object

b) Velocity of the object

c) Height from which the object is released

d) Air resistance

b) Velocity of the object

Q20. Two objects of different masses are dropped from the same height at the same time. Which of the following is true about their motion under gravity?

a) The object with larger mass falls faster

b) The object with smaller mass falls faster

c) Both objects fall with the same acceleration and hit the ground at the same time

d) The acceleration of both objects is different

c) Both objects fall with the same acceleration and hit the ground at the same time

Q21. According to the law of gravitation, what happens to the force of attraction between two objects if the distance between them is doubled?

a) The force of attraction is doubled

b) The force of attraction is halved

c) The force of attraction is quartered

d) The force of attraction remains the same

d) The force of attraction remains the same

Q22. What is Johannes Kepler best known for?

a) His law of universal gravitation

b) His discovery of the moons of Jupiter

c) His laws of planetary motion

d) His invention of the telescope

c) His laws of planetary motion

Q23. What is Kepler’s second law of planetary motion?

a) The planets move in elliptical orbits with the Sun at one focus

b) The planets move faster when they are closer to the Sun and slower when they are farther away

c) The square of the period of a planet’s orbit is proportional to the cube of the semi-major axis of its orbit

d) The planets move in circular orbits around the Sun

b) The planets move faster when they are closer to the Sun and slower when they are farther away

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## Questions related to motion under gravity class 11

Question 1: What is the acceleration due to gravity on Earth’s surface?

a) 9.8 m/s²

b) 5.0 m/s²

c) 7.2 m/s²

d) 12.5 m/s²

Answer: a) 9.8 m/s²

Question 2: Which of the following quantities remains constant for an object in free fall?

a) Velocity

b) Acceleration

c) Displacement

d) Mass

Answer: b) Acceleration

Question 3: What is the relationship between the time of flight and the vertical component of projectile motion?

a) Directly proportional

b) Inversely proportional

c) No relationship

d) Depends on the angle of projection

Answer: a) Directly proportional

Question 4: If an object is thrown upwards, what happens to its velocity as it moves upward?

a) Increases

b) Decreases

c) Remains constant

d) Depends on the mass of the object

Answer: b) Decreases

Question 5: Which of the following is an example of projectile motion?

a) A car moving on a straight road

b) A satellite orbiting the Earth

c) A person climbing stairs

d) A ball thrown horizontally

Answer: d) A ball thrown horizontally

Question 6: What is the maximum height reached by a projectile in its trajectory?

a) Range

b) Time of flight

c) Vertical displacement

d) Horizontal displacement

Answer: c) Vertical displacement

Question 7: In the absence of air resistance, the horizontal component of velocity for a projectile is:

a) Constant throughout the motion

b) Increases with time

c) Decreases with time

d) Zero

Answer: a) Constant throughout the motion

Question 8: The range of a projectile is maximum when the angle of projection is:

a) 0°

b) 30°

c) 45°

d) 90°

Answer: c) 45°

Question 9: An object is dropped from a height. Neglecting air resistance, its acceleration at the highest point is:

a) 0 m/s²

b) 9.8 m/s² upwards

c) 9.8 m/s² downwards

d) 9.8 m/s² horizontally

Answer: c) 9.8 m/s² downwards

Question 10: The time taken by an object to fall freely from rest through a height ‘h’ is directly proportional to:

a) h

b) √h

c) 1/h

d) h²

Answer: b) √h

### What is motion?

Answer: Motion refers to the change in position of an object over time with respect to its surroundings. It can be described in terms of displacement, velocity, and acceleration.

### What are the different types of motion?

Answer: There are several types of motion, including:
Linear motion: Motion along a straight line.
Circular motion: Motion along a curved path or in a circular pattern.
Rotational motion: Motion of an object around its axis or center of rotation.
Oscillatory motion: Back-and-forth motion around a central equilibrium position.
Random motion: Unpredictable motion with no specific pattern.

### What is the difference between speed and velocity?

Answer: Speed is a scalar quantity that measures the rate at which an object covers distance. It is the magnitude of velocity and has no direction. Velocity, on the other hand, is a vector quantity that includes both speed and direction. It specifies the rate at which an object changes its position in a particular direction.

### What is gravity?

Answer: Gravity is a fundamental force of nature that attracts objects with mass towards each other. It is responsible for the phenomenon of weight and plays a significant role in determining the motion and interactions of celestial bodies, such as planets, stars, and galaxies.

### How does gravity work?

Answer: Gravity is described by Newton’s law of universal gravitation, which states that every particle of matter in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. In simpler terms, objects with more mass exert a stronger gravitational pull, and the force of gravity weakens as the distance between objects increases.

### Why do objects fall towards the Earth?

Answer: Objects fall towards the Earth due to the gravitational attraction between them and the Earth. When an object is released or dropped, the force of gravity pulls it downwards, causing it to accelerate towards the Earth’s surface. This acceleration is commonly referred to as the acceleration due to gravity, which is approximately 9.8 m/s² near the surface of the Earth.