Newton's laws of motion

Front

A cube slides down the surface of a ramp at a constant velocity. What is the magnitude of the frictional force that acts on the cube due to the surface?

Back

The component of weight of the cube parallel to the plane

Front

A box is accelerated to the right across rough ground by a horizontal force F_a. The force of friction is F_f. The weight of the box is F_g and the normal reaction is F_n. Which is the free-body diagram for this situation?

Back

Front

Two blocks of weight 5 N and 2 N are attached to two ropes, X and Y. The blocks hang vertically. The mass of the ropes is negligible. What is the tension in X and the tension in Y?

Back

7N, 2N

Front

A cart of mass 4.0 kg is being pulled with a force of 24 N. The cart accelerates at 3.0m s^–2. What is the net force on the cart?

Back

12 N

Front

What is the resultant force acting on box Y when two boxes in contact are pushed along a floor with a force F and move at a constant speed?

Back

0

Front

A constant force of 12 N is applied for 3.0 s to a body initially at rest. The final velocity of the body is 6.0m s^–1. What is the mass of the body?

Back

6.0 kg

Front

A force F acts on a block at an angle θ with respect to a horizontal surface. The block is moving with a constant velocity v along the surface. A resistive force acts on the block. Which of the following correctly represents the forces acting on the block?

Back

Front

An object falls vertically from rest with air resistance and reaches terminal speed. What is the distance–time graph for its motion?

Back

Front

A block rests on a rough horizontal plane. A force P is applied to the block and the block moves to the right. There is a coefficient of friction giving rise to a frictional force F between the block and the plane. The force P is doubled. Will the coefficient and F be unchanged or greater?

Back

unchanged, unchanged

Front

A waiter carrying a tray is accelerating to the right as shown in the image. What is the free-body diagram of the forces acting on the tray?

Back