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Physics Review #2

Total questions: 20

Worksheet time: 26mins

Name
Class
Date
1.
It is ever possible to be accelerating, even though your speed is constant?
a)
Yes
b)
No
2.

A ball is thrown upward with an initial velocity of 20 m/s. About how long will the ball take to reach its maximum height?

a)

8.0s

b)

6.0 s

c)

4.0 s

d)

2.0 s

3.

A projectile is launched at an angle of 45o with a velocity of 250 m s-1. If air resistance is neglected, the magnitude of the horizontal velocity of the projectile at the time it reaches maximum altitude is approximately equal to

a)

0 m/s

b)

176 m/s

c)

200 m/s

d)

250 m/s

4.
A 4 kg object is released from rest from a height of 10 m. Just before it hits the ground, its velocity in m s-1 is: 
a)
a. 200
b)
b. 14.1
c)
c. 4.5
d)
d. 28.3
5.
When gravity and air resistance balance each other out.
a)
constant acceleration
b)
free fall
c)
terminal velocity
d)
Newton's 2nd Law
6.
Energy can neither be created nor destroyed, it just changes form.
a)
Law of Energy
b)
Law of Conservation of Energy
c)
Law of Constant Energy
d)
Law of Energy Not Losey
7.
At which point is kinetic energy the largest?
a)
W
b)
X
c)
Y
d)
Z
8.
Centripetal acceleration always points
a)
in the direction of the object's motion
b)
in the opposite direction of the object's motion
c)
towards the center of the circle
d)
towards the outside of the circle
9.
Suppose two carts, one twice as massive as the other, fly apart when the compressed spring that joins them is released.  How fast does the heavier cart roll compared with the lighter cart?
a)
twice as fast
b)
the same
c)
half as fast
10.
What is it called when the force of gravity is acting on an object?
a)
Weight
b)
Sliding Friction
c)
Momentum
d)
Projectile Motion
11.

What would the object be doing as shown in the motion graph?

a)

stationary

b)

speeding up

c)

slowing down

d)

constant speed

12.

What would the object be doing as shown in the motion graph?

a)

stationary

b)

speeding up

c)

slowing down

d)

going back to start

13.

What would the object be doing as shown in the motion graph?

a)

stationary

b)

speeding up

c)

slowing down

d)

constant speed

14.

What is the mass of an object that accelerates 3 m/s2 when 33 Newtons of force is applied?

a)

.1 kg

b)

11 kg

c)

3 kg

d)

99 kg

15.
A rope is used to keep a 12 kg box sliding with a speed of 2 m/s in a circle with a radius of 3 m.  What is the centripetal acceleration on the box?
a)
.75 m/s2
b)
1.33 m/s2
c)
.66 m/s2
d)
1.5 m/s2
16.
A 70 kg runner has a velocity of 5 m/s. Her kinetic energy is
a)
875 J
b)
175 J
c)
1750 J
d)
350 J
17.

Find the distance between two objects with:

m1 = 50,000 kg

m2 = 200,000 kg

Fg = 3 x 10-5 N

Grav Constant, G = 6.67 x 10-11

a)

149.1 m

b)

22223.3 m

c)

18257419 m m

d)

300000 m

18.

How much will the force between 2 masses change if you triple one mass and double the distance?

a)

3x as strong

b)

3/4 of what it was

c)

1/4 of what it was

d)

2x as strong

19.
What is an elastic collision?
a)
When two objects collide and do not stick together
b)
When two objects collide and do stick together
20.
What is impulse?
a)
force done on an object
b)
Inertia in motion
c)
Change in momentum

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