A box slides along a ramp under gravity at a constant velocity. Choose all that

ID: 1332055 • Letter: A

Question

A box slides along a ramp under gravity at a constant velocity. Choose all that are correct from the following.

The vector sum of all the forces on the box is non-zero, and points downwards along the surface of the ramp.

The frictional force on the box is upwards along the surface of the ramp.

The frictional force on the box is perpendicular to the surface of the ramp.

The frictional force on the box is greater than the gravitational force.

The frictional force on the box is downwards along the surface of the ramp.

The vector sum of all the forces on the box is exactly zero.

The normal force on the box is vertically downwards.

The box has a non-zero net acceleration.

The normal force on the box is perpendicular to the surface of the ramp.

The correct answers are as follows:

(a) The frictional force on the box is upwards along the surface of the ramp.

(b) The vector sum of all the forces on the box is exactly zero.

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