FORCE

The diagrams show four objects, each acted on by only two forces. Which object is in equilibrium?

• A

• B

• C

• D

An object is travelling at constant speed in a straight line. There is no resultant force on the object.

What happens to the object?

• A It continues at constant speed but changes direction.

• B It continues at constant speed in the same direction.

• C Its speed decreases but it continues in the same direction.

• D Its speed increases but it continues in the same direction.

The diagram shows a large force of magnitude P and a small force of magnitude Q acting on a box. Which expression gives the magnitude of the resultant force on the box?

• P + Q

• P - Q

• P X Q

• P/Q

The diagram shows the two forces acting on a skydiver.

What is the resultant force on the skydiver?

• A 400 N downwards

• B 400 N upwards

• C 1000 N downwards

• D 1000 N upwards

There is no resultant force acting on a body.

Which statement is correct?

• A The body is either at rest or moving at constant speed in a straight line.

• B The body must be at rest.

• C The body is gaining speed.

• D The body is losing speed.

The diagrams show all the forces acting on each of four objects.

Which object is not in equilibrium

• A

• B

• C

• D

Two children X and Y pull on a rope in opposite directions. The diagram shows the size of each force and its direction. What is the resultant force on the rope?

• A 50 N towards X

• B 50 N towards Y

• C 950 N towards X

• D 950 N towards Y

The diagrams show the two forces acting on four objects P, Q, R and S. Which two objects experience equal resultant forces acting in the same direction?

• P and Q

• P and R

• Q and R

• Q and S

A parachutist falls vertically at constant speed.

Which statement about the resultant force on the parachutist is correct?

• A The resultant force on the parachutist acts vertically downwards.

• B The resultant force on the parachutist acts vertically upwards.

• C The resultant force on the parachutist is equal to his weight.

• D The resultant force on the parachutist is equal to zero.

The diagram shows two teams P and Q pulling on a rope. Team P pulls with a force of 500 N to the left and team Q pulls with a force of 800 N to the right.

What is the resultant force acting on the middle of the rope?

• A 300 N to the left

• B 300 N to the right

• C 1300 N to the left

• D 1300 N to the right