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1. A force F is required to push a crate along a horizontal floor at constant sp

ID: 2290762 • Letter: 1

Question

1. A force F is required to push a crate along a horizontal floor at constant speed v with friction present. What force would be necessary to push the crate on the same floor at a constant speed 3v, if the friction is the same as before.

a constant force 3F

a force that gradually increases to 3F

a constant force F

no force

2. When you are driving on a freeway at constant speed you still keep your foot on the acceleration. However, the total (net) force on the car is:

in the forward direction

towards rear

0 (zero)

depends on your speed

towards the center of the Earth

Explanation / Answer

1) A constant force F

2) zero