Sam pushes a crate across a level floor at a constant speed with a horizontal force. Gravity, friction and normal forces also act of the box. Which of the following statements is true?
a. The force from Sam is greater than the force of friction on the box.
b. THe force from Sam is less than the force of friction on the box.
c. The force from Sam is equal to the force of friction on the box.
d. There is no force of friction on the box.
2. Sam now doubles the amount of force he applies to the crate. Which of the following statements is true?
a. The friction of the box also increaes.
b. The box moves at a greater constant speed.
c. The box accelerates at a constant rate.
d. The box continues to move at the same speed.
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