WorksheetsUnit 4 Quiz
Total questions: 24
Worksheet time: 27mins
Name
Class
Date
1.
Centripetal force, created by swinging something in a circle, acts in a direction--
a)
along the path of motion
b)
away from the center of the circle
c)
toward the center of the circle
d)
tangent to the circle
2.
A 10kg car travels at a constant speed of 20.0 m/s around a horizontal circular track. Which diagram correctly represent the direction of the car's velocity (v) and the direction of the centripetal force (Fc) acting on the car at a particular moment?
a)
b)
c)
d)
3.
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
4.
Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?
a)
0.25 ms-2
b)
0.5 ms-2
c)
1 ms-2
d)
2 ms-2
5.
What happens to the centripetal force exerted on an object if you triple the velocity?
a)
it increases to 3X
b)
it decreases to 6X
c)
it increases to 6X
d)
it increases to 9X
6.
Who created the Universal Law of Gravitation?
a)
Copernicus
b)
Newton
c)
Kepler
d)
Galileo
7.
How are mass and weight different?
a)
Mass is the amount of matter in an object;Weight is the amount of gravitational force acting on the object
b)
Mass is the amount of gravitational force acting on an object;Weight is the amount of matter in an object
c)
Mass is a thing;Weight is a place
d)
Mass is an animal;weight is a human
8.
does mass or weight change on an object in space
a)
Only weight
b)
only height
c)
None of the above
d)
both of them
9.
What is the value of g on Earth?
a)
9.81 m/s^2
b)
9.81 N
c)
9.81 m
d)
9.81 s/m^2
10.
Two factors effecting the magnitude of the force of gravity between 2 objects are...
a)
mass and distance
b)
mass and matter
c)
distance and weight
d)
weight and mass
11.
As distance between two objects increase the pull of gravity
a)
Increases
b)
Decreases
c)
Stays the same
12.
Double the distance between two objects
a)
4 times greater gravity attraction
b)
4 times weaker gravity attraction
c)
2 times weaker gravity
d)
2 times greater gravity
13.
Double the product of the masses of two objects
a)
4 times stronger gravity force
b)
4 times weaker gravity force
c)
2 times weaker gravity force
d)
2 times stronger gravity force
14.
How can you explain that we have a stronger gravitational attraction with Earth than the Sun?
a)
The sun has a larger mass
b)
The sun has a smaller mass
c)
Closer to center of sun
d)
Closer to center of Earth
15.
Planets orbit the Sun in a shape called a(n)
a)
circle
b)
ellipse
c)
focus
d)
perihelion
16.
A planet moves fastest during its orbit around the Sun at the when
a)
it is closest to the sun and gravity has a stronger pull
b)
it is farthest from the sun and gravity has a stronger pull
c)
it is closest to the sun and gravity has a weak pull
d)
it is farthest from the sun and gravity has a weak pull
17.
Forces are measured with what units?
a)
Grams
b)
Newtons
c)
kg
d)
m
18.
A force is represented by what symbol?
a)
F
b)
G
c)
g
d)
m
19.
In this equation...
a)
G is the gravitational field strength
b)
r is the distance between the 2 masses
c)
F is the repulsive gravitational force
d)
m is the momentum of the mass
20.
Find the force of gravity (Fg) for two objects with:
m1 = 6.0 * 1024 kg
m2 = 1000 kg
d = 6.4 * 106 m
m1 = 6.0 * 1024 kg
m2 = 1000 kg
d = 6.4 * 106 m
a)
1.46 * 1014 N
b)
9770 N
c)
6.25 * 1010 N
d)
1.64 * 1031 N
21.
This symbol represents the...
a)
Frequency (Hz)
b)
Angular velocity (rad/s)
c)
Period (s)
d)
Centripetal acceleration (m/s2)
22.
The unit used for frequency is...
a)
m/s
b)
m/s2
c)
hertz
d)
seconds
23.
The tiger makes 15 revolutions on the carousel in 180 seconds. What is the period of the tiger?
a)
0.6 seconds
b)
5 minutes
c)
12 seconds
d)
15 rpm
24.
In the equations, frequency=1/period and period=1/frequency. What kind of relationship are frequency and period?
a)
direct
b)
inverse
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