A 10 kg block is being pulled in a straight line across a horizontal tabletop wi

Question

A 10 kg block is being pulled in a straight line across a horizontal tabletop with a constant force of 40 N, and it is moving with a constant speed of m/s. If the pulling force is suddenly reduced to 20N, which of the following will happen? The block will stop suddenly. The speed of the block will drop suddenly to 3 m/s, and the block will then move with this constant speed. The block will slow down steadily (but not suddenly) until its speed becomes 3 m/s, and it will then move with this constant speed. The block will slow down steadily (but not suddenly) until it comes to a full stop. Initially, n car is travelling north with a speed of 10 m/s. Later the cut is travelling west with a speed of 10 m/s. During this time, the car has undergone a change in velocity. What is the direction of this change in velocity? Northwest southwest northeast southeast

Explanation / Answer

9) The block will slow down steadily as the force won't be enough to pull the block across the table.

10) The car changes direction from north to west, hence the change in direction of velocity will be in the south-west direction.

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