Download Complete the following on a separate sheet of paper

Complete the following on a separate sheet of paper. Show Your Work Clearly and Neatly.
Please BOX your final answer. Sig-Figs Count.
Use the following formulas:
F = ma
w=mg
9.8 N
1.0 kg
or
1.0 kg
9.8 N
v =a t
d = 1/2at2
2.2 lb
1.0 kg
or
1.0 kg
2.2 lb
1. What is Force?
2. How much force is needed to accelerate a 1050.0 kg car at a rate of 4.00 m/s2?
3. How much force is needed to accelerate a 20.0 kg rider and the 10.0kg bike the rider
is on at 3.00 m/s2?
4. It takes a force of 30.0 N to accelerate an empty 15.0 kg red wagon at 2.00 m/s2. If a
35.0 kg porcelain dog is inside the wagon, how much force is needed to produce the
same acceleration?
5. If a 154.0 pound swimmer pushes off a pool wall with a force of 20.0 N, at what rate
will the swimmer accelerate from the wall?
6. A dancer lifts his partner above his head with an acceleration of 2.50 m/s2. The
dancer exerts a force of 125 N. What is the mass of the partner in kg? Weight in
Pounds?
7. If a car is able to accelerate at 6.0 m/s2, what acceleration can it attain if it is towing
another car of equal mass? Explain your answer.
8. A constant unchanging force of 30.25 N is applied to a 12.02 kg object for exactly
15.00 seconds. What is the final velocity of the object after the 15.00 seconds (if
object starts at rest)? What kind of motion does the constant unchanging force
produce on this object?
9. Use Newton’s second law to explain why objects of different masses will fall to the
Earth at the same time if there is no air resistance.
10. Forces of 10.0 N and 20.0 N in the same direction act on an object. What is the net
force on the object?
11. If the forces exerted on an object are 50.0 N in one direction and 30.0 N in the
opposite direction, what is the net force exerted on the object?
12. A 50.0 N force is applied to a 5.00 kg object (which is at rest) for 10.0 seconds. How
far does the object travel during the time that the net force is acting on the object?
13. Lopez drops a solid Gold basketball and a real basketball fall from a ledge (no air
resistance). Kedge, while walking below, sees the two basketballs falling. Which
one should he attempt to catch? EXPLAIN using Newton’s 2nd law.
14. A rocket fired from its launching pad not only picks up speed but its acceleration also
increases significantly as firing continues. Why is this so? (Hint: most of the
rocket’s initial mass is fuel)
Science @ Lopezville