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revision quiz

Total questions: 28

Worksheet time: 42mins

Name
Class
Date
1.

_________ is the unit of Spring Constant

a)

N

b)

N/m

c)

m

2.

According to Hooke's law; Force is equal to -

a)

Spring Constant × Extension

b)

Spring Constant ÷ Extension

c)

Spring Constant + Extension

3.

___________ is the unit of force

a)

Km

b)

cm

c)

m

d)

N/cm

e)

N

4.

What is the spring constant of a bungee rope in N/m if a person weighs 100 N if we want it to extend (stretch) 20m?

a)

5N/m

b)

5N/cm

c)

5N

d)

10N

e)

10N/m

5.

If you apply a force to deform a material then remove the force and the material returns to its original shape this is

a)

elastic deformation

b)

plastic deformation

c)

inelastic deformation

d)

unplastic deformation

6.

If you apply a force to deform a material then remove the force and the material does not return to its original shape this is

a)

elastic deformation

b)

plastic deformation

c)

rubber deformation

d)

unplastic deformation

7.

We need to test materials

a)

to find their properties eg their stiffness or ultimate tensile strength

b)

to see if they work

c)

to see how good they are

d)

to make sure they will work

8.

What is the stress when a force of 10N acts over a circular area of diameter 3mm?

a)

1.4x106 Pa

b)

3.3x10-3 Pa

c)

3.3 Pa

d)

354x103 Pa

9.

A 2m wire extends by 4mm what is the strain?

a)

0.5

b)

2x10-3

c)

2x10-6

d)

0.005

10.

What is the Youngs Modulus if a stress of 25MPa causes a strain of 0.003?

a)

8x109 Pa

b)

8x106 Pa

c)

8x103 Pa

d)

8x10-3 Pa

11.
A particle P is moving in a circle with uniform speed. Which one of the following diagrams correctly shows the direction of the acceleration a and velocity v of the particle at one instant of time?
a)
A
b)
B
c)
C
d)
D
12.

Bentley the bat has a mass of 0.58 kg and flies at a speed of 0.8 m/s in circle of radius 0.5 m. What is his acceleration?

a)

0.25 m/s2

b)

1.3 m/s2

c)

1.6 m/s2

d)

0.74 m/s2

13.

What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?

a)

5 m/s2

b)

17.63 m/s2

c)

10 m/s2

d)

8.81 m/s2

14.

The drum of a washing machine rotates 1800 times in 3 minutes. What is the period?

a)

0.1 s

b)

0.2 s

c)

0.3 s

d)

0.5 s

15.

what is the centripetal acceleration formula?

a)
b)
c)
d)
16.

What is the velocity formula for uniform circular motion?

a)
b)
c)
d)
17.
The time taken for one complete circuit is called the... 
a)
Period
b)
Frequency 
c)
Angular velocity
18.
What states that "every object in the universe attracts every other object"?
a)
Law of Universal Gravitation
b)
Newton's First Law of Motion
c)
My mother
d)
Inertia & gravity
19.
What is the Universal law of gravitation equation? 
a)
G=F ⋅ m⋅m2/r2
b)
F=G ⋅ m⋅m2/(r)2
c)
F=G ⋅ r2/m⋅m2
d)
G=F ⋅ r2/m⋅m2
20.
Force of gravity is inversely proportional to
a)
Mass
b)
Weight
c)
Distance
d)
Time
21.
Two asteroids exert a gravitational force, F, on each other. Some time later, the asteroids are now three times as far from each other as before. Which of the following represents the gravitational force at this distance? 
a)
F/3
b)
F/2
c)
F/6
d)
F/9
22.

The Universal Gravitational constant (G) is equal to what?

a)


6.67×10−11 N m2kg26.67\times10^{-11}\ N\ \frac{m^2}{kg^2}

b)

9.8 m/s^2

c)

100 N

d)

1.44×106 m1.44\times10^6\ m

23.

Calculate the gravitational force between two objects when they are 0.750m apart. Each object has a mass of 5.00kg.

a)

2.96x10-7N

b)

3.00x10-6N

c)

2.22x10-9N

d)

2.23x10-8N

24.
The law of universal gravitation is credited to whom?
a)
Einstein
b)
Galileo
c)
Darwin
d)
Newton
25.

Two spherical objects have masses of 8000 kg and 1500 kg. Their centers are separated by a distance of 1.5 m. Find the gravitational attraction between them

a)

5.4 X 10-4 N

b)

1.2 X 107 N

c)

3.6 X 10-4 N

d)

5.33 N

26.
Complete the following statement: The farther away two planets are the _______ the gravitational force between them.
a)
more
b)
same
c)
dosen't matter
d)
less
27.

Which configuration will result in the greatest gravitational force?

a)

small masses far apart

b)

large masses far apart

c)

small masses close together

d)

large masses close together

28.

The reason why ocean tides happen is

a)

Electrical forces between the sun and the moon

b)

gravitational forces between the Earth and the moon.

c)

Magnetic forces between the Earth and the moon

d)

Motion of the moon around the earth

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