Download Unit 5 Review

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UNIT V: Review
1)What happens to the acceleration of an object when the net force acting on it doubles?
2)What happens to the acceleration of an object if the net force on it remains constant but the mass
of the object is cut in half?
3) In the diagram to the right, a 20N force is applied on
an 8kg block at the angle shown.
a)Solve for the normal force acting on the block.
b)Assuming the surface is frictionless, solve for the acceleration of the block.
c)What would the acceleration be if instead the coefficient of friction is 0.2?
4) A 2kg block of dry ice starts from rest on a smooth ramp as shown.
a)What is the acceleration of the block?
b) How far does it move in 2s?
6.
The elevator shown accelerates downward at -2.0 m/s2.
a. Construct a force diagram for the man.
b. What force does the floor exert on the man if he has a mass of 85kg?
7. A race car has a mass of 490 kg. It starts from rest and travels 70.0m in 5.0s. The car is
uniformly accelerated during the entire time. What net force is acting on the car?
8) Sketch an x vs t and an a vs t graph for the v vs t
graph given.
Solve for the acceleration during the period 0<t<6s.
From t=6s to t=8s, the object is
a) Speeding up
b) Slowing down
c) Moving at a constant velocity
d) Not moving at all