Worksheet for PSC1515
Chapter 2
1. If a car is travels 750 miles in 50 minutes, what is the speed?
2. If a car travels at 65 mi/h and it takes 2.7 hours to reach the destination,
what distance did the car travel?
3. What is the acceleration that a truck undergoes if it changes from 25 mi/h
to 40 mi/h in 20 s?
4. What is the acceleration that a bicycle undergoes if it goes from a state of
rest to 22 mi/h in 2 min?
5. Indicate which of the following quantities are directly proportional (DP) or
inversely proportional (IP):
a. y = k x
y and x _________
b. w = k/z
w and z _________ Note that k is a constant.
c. F = m a
F and a if m is constant_____________
d, F = m a
F and m if a is constant_____________
e. v = d/t
v and t if d is constant___________
6. Indicate what would be the net force for the following:
a.
Fapplied = 4 units
F floor = 2 unit
Fair = 1 unit
Fnet= __________ units
b. Fapplied = 4 units
Fapplied = 5 units
Ffloor = .5 unit
Fair = .3 unit
Fnet = ___________units
6. What are the units for the following using SI units?
a. speed ______________
b. acceleration____________
c. force_______________
7. A 70 kg bike and rider accelerate 24 m/s2. What was the force required to
accomplish this?
8. What are the units for the following in the English and the metric systems?
English
Metric
a. Mass
___________
___________
b. Weight
___________
___________
9. What is the weight of an object that has a mass of 37 kg?
10. Which sphere would land on the floor quicker, A: made of brass with a
mass of 3 kg or B: made of rubber with a mass of .5 kg? Both spheres
have the same size._____________________
11. Identify each of the following as Newton’s 1st, 2nd , or 3rd law of motion:
a. F = m a _______________
b. FA due to B = FB due to A _______________
c. Every object maintains its inertia unless acted upon by an
unbalanced force___________________
1. 15 mi/min 2. 176 mi 3. 0.75 mi/h/s 4. 11 mi/h/min
5. DP, IP, DP, DP, IP
6. 1, 8.2
7. m/s, m/s2 , kg m/s2 or Newton (N)
7. 1680 kg m/s2 or 1680 N 8. lb/ft/s2 , kg
lb
kg m/s2
9. 363 kg m/s2 or 363 N
11. 2nd, 3rd, 1st
10. Both reach the floor at the same time.