first law of motion

1. What causes the motion of a body which is initially in the state of rest?

• a) Force

• b) Displacement

• c) Speed

• d) Velocity

2. People sitting in a moving bus experience a jerk when the bus stops. This is due to _____

• a) Inertia of motion

• b) Inertia of rest

• c) Inertia of turning

• d) Inertia of acceleration

3. Passengers sitting in a stationary car experience a jerk when the car suddenly starts. This is due to _____

• a) Inertia of motion

• b) Inertia of rest

• c) Inertia of turning

• d) Inertia of acceleration

4. In the following figure, what will happen to the ball hanging from the roof of the car if the car suddenly moves towards left (direction shown by arrow)?

• a) Ball moves towards right

• b) Ball moves towards left

• c) Ball does not move

• d) Ball moves out of the paper

5. A straight moving bus takes a sharp right turn. What will happen to the passengers sitting inside the bus?

• a) They will tilt rightwards

• b) They will stay the way they were

• c) They will start jumping

• d) They will tilt leftwards

6. Why do we not experience any leaning when a train takes a turn?

• a) Because the driver is smart

• b) Because the train does not turn

• c) Because of large turning radius

• d) Because the train is powerful

7. Inertia is _____

• a) Property of mass to remain unchanged

• b) Property of mass to accelerate

• c) Property of mass to change continuously

• d) Tendency of mass to accelerate

8. Newton's first law of motion is also known as.....?

• a). law of moment

• b). law of inertia

• c). law of consvervation of energy

• d). law of mementum

9. A particle is moving with a constant speed along a straight line, force is not required to ........

• a). to increase its speed

• b). Decrease the momentum

• c). change the direction

• d). keep it moving with uniform velocity

10. when a motor car makes a sharp turn at a high speed, we slip to one side of the seat. This is because?

• a). Frictional force

• b). Gravitational force

• c). Repulsion force

• d). inertia of our bodies