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Quiz#4 Acceleration and Momentum

Total questions: 20

Worksheet time: 16mins

Name
Class
Date
1.

The rate that a car's velocity changes is its

a)

speed

b)

force

c)

gravity

d)

acceleration

2.
Acceleration is defined as the CHANGE in 
a)

the time it takes for one place to move to another place. 

b)

the mass of an object divided by the time interval.

c)

the distance divided by the time interval 

d)

the velocity divided by the time interval 

3.

A negative acceleration means that an object is _____. 

a)
not accelerating
b)
not moving
c)
speeding up 
d)
slowing down 
4.
A drag racer accelerated from 0 m/s to 200 m/s in 5 s.  What was the acceleration?
a)
0 m/s
b)
40 m/s2
c)
-40 m/s2
d)
40 m/s
5.

In which of the following cases does a car have zero acceleration?

a)

A car speeding up after a stoplight turns green.

b)

A car slowing down when it approaches a stop sign.

c)

A car set on cruise control so that is maintains 45 mi/hr.

d)

A car turning a curve at a constant speed.

6.
The SI unit for acceleration is
a)
mph
b)
ft/sec2
c)
m/s2
7.
A dog runs with an initial speed of 7.5 m/s on a waxed floor.  It slides to a stop in 15 seconds.  What is the acceleration?
a)
-7.5 m/s
b)
-7.5 m/s2
c)
-0.5 m/s2
d)
7.5 mi//hr
8.
A box sliding down an inclined plane attains a velocity of 27 m/s in 3 seconds from rest.  Find the acceleration.
a)
30 m/s
b)
24 m/s2
c)
9 m/s2
d)
81 km/hr
9.
The picture of the position vs. time graph shows an object that is...
a)
accelerating/speeding up
b)
moving at a constant speed 
c)
not moving 
d)
accelerating/slowing down. 
10.
Determine the motion of the car.
a)
at rest 
b)
moving at constant speed
c)
speeding up
d)
slowing down
11.
The momentum of an object depends upon the object's ___________&_____________.  
a)
size and shape
b)
mass and speed
c)
mass and veloctiy
d)
mass and energy
12.
In any collision (crash) the ______ is ALWAYS constant
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
13.
A 50 kg ball rolls down the street at 5 m/s. Calculate the momentum of the ball. 
a)
55 kg*m/s
b)
100 kg*m/s
c)
250 kg*m/s
d)
500 kg*m/s
14.

Two skaters begin at rest. Skater 1 has a smaller mass than Skater 2. After they push off each other,...

a)

Skater 1 experiences a greater change in momentum

b)

Skater 2 experiences a greater change in momentum

c)

Skater 1 has a greater speed than Skater 2

d)

Skater 1 experiences a greater force

15.

Which of the following has the MOST momentum?

a)

rolling ping-pong ball

b)

rolling bowling ball

c)

rolling soccer ball

d)

rolling basketball

16.

A large moving ball collides with a small stationary ball. The momentum

a)

of the large ball decreases, and the momentum of the small ball increases.

b)

of the small ball decreases, and the momentum of the large ball increases.

c)

of the large ball decreases, and the momentum of the small ball decreases.

d)

does not change for either ball.

17.
Collisions can be ____________or ___________.
a)
fast or slow
b)
far or near
c)
elastic or inelastic
d)
none of the above
18.
The law of conservation of momentum states that, 
a)
p before is less than p after
b)
p before is the same as p after
c)
p before is more than p after
19.
What makes it possible to determine the motion of objects before or after colliding?
a)
Conservation of Energy
b)
Conservation of Strength
c)
Conservation of Momentum
d)
Conservation of Homework
20.

Inertia is ...

a)

When two objects hit each other with force.

b)

A measurement on how easy it will be to stop a moving object.

c)

The tendency of an object at rest to stay at rest or an object in motion to stay in motion.