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Review Guide for Quarter Opportunity – 2016
Name SI Base Units:
The following are unit of what?
1.
2.
3.
4.
5.
6.
7.
kg Nm/s m/s/s or m/s2 Ns ms-
What is the product of 11.0 and 14 to the correct number of sig figs?
How many g are in the following:
1. 1.2 kg
2. 200 cg
3. 4500 mg
How many kg are in the following:
1. 7870 g
2. 2,000,000 mg
3. 15 g
How far will an object move from rest with an acceleration of 5 m/s/s in
1.
2.
3.
4.
1s
2s
3s
4s
Describe the motion of an object at constant velocity or motion and that of an accelerating object.
Define vector and list several.
Define scalar and list several.
Draw a vector diagram with resultant.
Any object in free fall (neglecting air resistance or in a vacuum) will have an acceleration of…
Describe Newton’s three laws:
Describe a scenario for each of Newton’s laws.
Write a formula for all of the ways to determine Impulse. (Hint: There are at least three different forms
 two are just different ways of writing the same equation)
Write all of the equivalent units for Impulse.
Determine the impulse of the following:
1.
2.
3.
4.
7 N for 3.0 s
8 kg objects brought to rest from 4.0 m/s
An object with 9.0 kgm/s  21.0 kgm/s
A 2.5 kg object initially at 3.0 m/s changes direction to -4.0 m/s
Explain how padding influences Impulse, Force, and time of impact.
Define a closed system. What forces are at play in a closed system? How many objects are involved?
How is momentum involved (what equation)?
Define an open system. What forces are at play in an open system? How many objects are involved?
How is momentum involved (what equation)?
Describe a recoil event. Explain all of the implications of momentum in a recoil event.
Two objects are moving in the same direction. Object A has a mass of 3.0 kg and a velocity of 6.0 m/s.
Object B has a mass of 5.0 kg and at rest. They collide. What is the momentum of the system after the
collision?
Use the Force vs Time graph below to answer the following questions:
The object is initially at rest.
When is the momentum of the object negative?
Which Impulse in the graph is largest?
What is the momenta at each of the following positions:
1.
2.
3.
4.
A 75 kg hockey player throws a 10 kg medicine ball. The medicine ball has a velocity of 15 m/s. What is
the velocity of the hockey player?
A 5 kg cat jumps onto a 2 kg skateboard moving at a constant velocity of 4.0 m/s. What is the velocity of
the cat on the skateboard?
A 1 kg ball is thrown at a wall with a velocity of 55 m/s. It bounces back at -30 m/s. What were the
momenta of the ball before and after the bounce? What was the impulse applied to the ball from the
wall?
Draw dots for an object at constant speed and for another object initially faster but slowing down to
rest. Find the time interval for when they had nearly the same velocity. When did one ball pass the
other? Which ball is moving faster at second 1?
Calculate the acceleration of a car moving from rest to 35.0 m/s in 4.5 seconds.
A car traveling at a constant 18 m/s travels 65 m. How long did it take?
Describe scenarios of velocity and acceleration having different signs (ie +, -, or 0)
Mr. Champ pulls a wagon with his son sitting in it. He pulls the handle making a 50 angle with the
horizontal. How hard must he pull so that the x-component is equal to 50 N? What is the vertical
component of the handle?
A cyclist on a 50.0 miles training ride wishes to average 14.0 miles/hour for the entire ride. If it takes
90.0 minutes to ride the first 20.0 miles, how fast must she finish the ride to reach her goal?
A car is speeding at 15 m/s and passes a police officer at rest at the side of the road. As soon as the car
passes the police car, the police car accelerates at a constant 2.5 m/s/s. When and where does the
police officer catch the speeder?
At what time do the objects have the same velocity?
How fast is the police officer going when he catches the speeder?
Sketch a position vs time and velocity vs time graph for the previous scenario. Indicate where the
objects meet, and where they have the same velocity.
A 25 kg cart is pushed down the hall with a pushing force of 100 N. The force of friction contributes 30
N. What is the acceleration of the cart?
Two objects with masses of 10 kg and 15 kg are hung on either side of a frictionless pulley. Determine
the acceleration of the system. How far will the system move in 3.0 seconds, assuming there is enough
string to do so.
Tom Cruise goes sliding across the floor in his socks. His initial velocity is 15 m/s and he comes to rest in
3 seconds. What is the coefficient of friction between his socks and the floor?