IMAT - International Medical Admissions Kinematics and Dynamics Questions and Answers

Question 1

A stone is thrown horizontally with a speed of 10 m/s from the top of a cliff that is 45 m high. Neglecting air resistance, how long does it take for the stone to reach the ground? (Use g = 10 m/s²)

Accepted Answer

3.0 s

Answer

4.5 s

Answer

1.5 s

Answer

9.0 s

Question 2

A book is resting on a horizontal table. According to Newton's Third Law of Motion, what is the reaction force to the gravitational force exerted by the Earth on the book?

Accepted Answer

The gravitational force exerted by the book on the Earth.

Answer

The normal force exerted by the table on the book.

Answer

The net force on the book, which is zero.

Answer

The frictional force between the book and the table.

Question 3

A 5 kg box is pulled 4 m up a frictionless ramp inclined at an angle of 30° to the horizontal. What is the work done against the force of gravity? (Use g = 10 m/s²)

Accepted Answer

100 J

Answer

200 J

Answer

173 J

Answer

50 J

Question 4

Which of the following statements is always true for an inelastic collision between two objects in an isolated system?

Accepted Answer

Momentum is conserved, but kinetic energy is not.

Answer

Kinetic energy is conserved, but momentum is not.

Answer

Both kinetic energy and momentum are conserved.

Answer

Neither kinetic energy nor momentum is conserved.

Question 5

The velocity-time graph for an object's motion is a straight line passing through the origin with a positive slope. Which of the following correctly describes the object's motion?

Accepted Answer

The object is moving with constant positive acceleration.

Answer

The object is at rest.

Answer

The object is moving with constant velocity.

Answer

The object is moving with increasing acceleration.

Question 6

A car of mass 1200 kg travels at a constant speed of 20 m/s around a flat, circular bend with a radius of 80 m. What is the magnitude of the centripetal force required to keep the car on this path?

Accepted Answer

6000 N

Answer

300 N

Answer

2400 N

Answer

48000 N