Force and laws of motion hard

Force and Laws of Motion Quiz (Hard)

1. Which of Newton's laws of motion states that the rate of change of momentum of an object is directly proportional to the net external force acting on it?

a) Newton's First Law b) Newton's Second Law c) Newton's Third Law d) None of the above

2. When a force is applied to an object, the force is transmitted through the object without any change in magnitude or direction. This is known as:

a) Inertia b) Newton's Second Law c) Newton's Third Law d) Principle of Superposition

3. A car is moving on a straight road with a constant velocity. Which of the following statements about the forces acting on the car is correct?

a) There are no forces acting on the car. b) The net force acting on the car is zero. c) The car is under the influence of a single force. d) The car is under the influence of multiple forces, but they are balanced.

4. When a force is applied to an object in the direction opposite to its motion, the object's speed will:

a) Increase b) Decrease c) Remain constant d) First increase and then decrease

5. Which of the following is an example of an action-reaction pair of forces?

a) The force of gravity pulling an object downwards and the force of the object pushing the Earth upwards b) The force of a person pushing a wall and the force of the wall pushing the person c) The force of a book resting on a table and the force of the table pushing the book upwards d) The force of a car's engine pushing it forward and the force of friction opposing its motion

6. A truck and a car are moving with the same velocity. Which of the following statements about their inertia is correct?

a) The truck has greater inertia than the car. b) The car has greater inertia than the truck. c) Both the truck and the car have the same inertia. d) Inertia depends on the mass, so it cannot be determined from the given information.

7. An object moves in a circular path with a constant speed. The net force acting on the object:

a) Is directed towards the center of the circle. b) Is directed away from the center of the circle. c) Is zero. d) Depends on the mass of the object.

8. If the velocity of an object is constant, which of the following statements about the forces acting on the object is correct?

a) The net force is zero. b) The net force is non-zero. c) The net force is directed upwards. d) The net force is directed downwards.

9. A force of 10 N acts on an object for 5 seconds. The change in momentum of the object is:

a) 2 kg m/s b) 5 kg m/s c) 50 kg m/s d) 100 kg m/s

10. Which of the following is an example of a non-contact force?

a) Magnetic force b) Frictional force c) Tension in a rope d) Applied force