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Exam 1

Total questions: 60

Worksheet time: 58mins

Name
Class
Date
1.

For work to be done, a force must be applied to the object over a distance and the object must move in response to the force.

a)

True

b)

False

2.

What is a force?

a)

a rigid bar balanced on a fulcrum

b)

a push or pull on an object

c)

a sloping surface like a ramp

d)

two or more simple machines working together

3.

What is a spring scale?

a)

scientific tool used to measure force

b)

a rigid bar balanced on a fulcrum

c)

a tool created to help reduce the amount of work

d)

a push or pull on an object

4.

A boy pulls a wooden toy frog across the floor. Is work being done?

a)

Yes

b)

No

5.

My dad lifted a box and put it into the moving van. Is work being done?

a)

Yes

b)

No

6.

To describe a car’s motion, a student should use its -

a)

direction and speed

b)

mass and volume

c)

speed and color

d)

volume and direction

7.

A class is planning a roller-skate race. Which surface would be the best for the race?

a)

glass

b)

grass

c)

blacktop

d)

gravel

8.

A screw can be considered a variation of which simple machine?

a)

Lever

b)

Inclined Plane

c)

Pulley

d)

Wheel and Axle

9.

Which simple machine is used to cut or split objects?

a)

Wedge

b)

Screw

c)

Pulley

d)

Lever

10.

What is the purpose of a fulcrum in a lever system?

a)

To hold the lever in place

b)

To provide a pivot point around which the lever moves

c)

To increase the weight of the lever

d)

To measure the force applied on the lever

11.

The mechanical advantage of a lever depends on which of the following?

a)

The length of the lever arm

b)

The weight of the lever itself

c)

The color of the lever

d)

The material from which the lever is made

12.

What is a simple machine?

a)

A device that can change the direction of a force

b)

A complex system that requires electricity to operate

c)

A tool that only performs work in industrial settings

d)

A machine that can only be used by professionals

13.

How does a wheel and axle make work easier?

a)

By increasing the distance over which the force is applied

b)

By reducing the amount of force needed

c)

By increasing the speed of the task

d)

By reducing the time taken to complete the task

14.

Which simple machine is used to move heavy objects up a slope with less effort?

a)

Wedge

b)

Screw

c)

Pulley

d)

Inclined Plane

15.

How does a screw make work easier?

a)

By increasing the distance over which the force is applied

b)

By reducing the amount of force needed

c)

By increasing the speed of the task

d)

By reducing the time taken to complete the task

16.

Which simple machine is used to lift heavy objects with less effort?

a)

Wedge

b)

Screw

c)

Pulley

d)

Lever

17.

Which of the following is NOT considered a type of simple machine?

a)

Lever

b)

Pulley

c)

Battery

d)

Inclined Plane

18.

What is Resistance?

a)

The flow of electrons

b)

Electric potential difference

c)

A battery

d)

The ability to reduce the flow of electrons

19.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
d)
light
20.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
21.

Current times Resistance equals

a)

Power

b)

Voltage

c)

Amperage

d)

Ohm

22.

Voltage divided by Resistance

a)

Current

b)

Power

c)

Ohms

d)

Watts

23.

Voltage divided by Current

a)

Current

b)

Power

c)

Resistance

d)

Watts

24.
If the Voltage is increased and the resistance stays the same, Current will
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
25.
If the Voltage is increased and the resistance stays the same, Current will
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
26.
How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor
a)
12 volts
b)
24 volts
c)
1.3333
d)
48 volts
27.

Magnetism is a force of ____________________________ that occurs between two _____________ objects.

a)

attraction or repulsion, magnetic

b)

external or internal, magnetic

c)

external or repulsion, electronic

d)

attraction or internal, electronic

28.

A magnetic field is a field of force that is produced by moving ________ charges.

a)

northern

b)

positive

c)

gravitational

d)

electric

29.

To pull objects toward each other

a)

Attract

b)

Repell

c)

Convert

d)

Energy

30.

A student studying a circuit diagram of a lightbulb, battery, and a switch correctly identifies it as a closed circuit. In this diagram, the lightbulb would be

a)

an insulator.

b)

on.

c)

disconnected.

d)

off.

31.
How do you increase the strength of an electromagnet?
a)
Decrease the number of batteries and increase the number of coils
b)
Increase the electric current and decrease the batteries
c)
You cannot strengthen an electromagnet
d)
Increase the electric current and increase the number of coils
32.
How are electromagnets different from regular magnets?
a)
Their strength can be changed
b)
They can be turned on and off
c)
Their polarity can be reversed
d)
All choices are correct
33.
A coil of wire that has a soft iron core and that acts as a magnet when an electric current is in the coil is call a(n)
a)
Ferromagnet
b)
Electromagnet
c)
Permanent magnet
d)
Temporary magnet
34.
What is created when a magnet moves through a coil of wire?
a)
An electric current
b)
An electromagnet
c)
A solenoid
d)
A ferromagnet
35.
A machine that converts electrical energy into mechanical energy.
a)
Generator
b)
Motor
c)
Parallel circuit
d)
Ohm
36.
What makes an electromagnet stronger?
a)
Increase the number of wire wraps around the iron core
b)
decrease the strength of the power source
c)
remove the source of current
d)
lightning bolts hitting a tree
37.
What is the relationship between electrical current and magnetic field strength in an electromagnet?
a)
When current is increased, magnetic field strength increases
b)
When current is increased the strength of magnetic field decreases
c)
When the current is decreased, the strenght of the magnetic field is increased.
d)
There is an "indirect proportion," meaning, if the value of one goes up, the value of the other goes down.
38.
An object at rest will _______ if no outside forces are applied.
a)
Stay at rest
b)
Increase Velocity
c)
Decrease Mass
39.
A greater applied force is required to move an object with a greater mass than one with a smaller mass.
a)
True
b)
False
40.
The SI units for force are...
a)
Kilograms
b)
Newtons
c)
Meters per second
d)
Pounds
41.
According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will
a)
remain in motion.
b)
eventually come to a stop.
c)
change its momentum.
d)
accelerate.
42.
An ice skater at rest pushes against a sled at rest, causing both the skater and sled to move away from each other with different accelerations. This is an example best described by
a)
Newton’s first law of motion for objects at rest.
b)
Newton’s first law of motion for objects in motion.
c)
Newton’s second law of motion.
d)
Newton’s third law of motion.
43.
A sled sliding on a flat, icy surface with a constant velocity is best described by
a)
Newton’s first law of motion for objects at rest.
b)
Newton’s first law of motion for objects in motion.
c)
Newton’s second law of motion.
d)
Newton’s third law of motion.
44.
What is the speed of a car that travels 400 m in 20 minutes?
a)
20 miles/hr
b)
20 m/min
c)
800 m/min
d)
200 miles/hr
45.
What is the speed of a man who runs 10 miles in 1 hr?
a)
20 miles
b)
10 m/min
c)
10 miles/hr
d)
20 hrs
46.
A train travels 25 km in .5 hrs. How fast is the train going?
a)
25 miles/hr
b)
5 miles/hr
c)
125 km/hr
d)
50 km/hr
47.
What is the equation to calculate speed?
a)
speed = distance/time
b)
speed = time/distance
c)
speed = time x distance 
d)
speed = speed/time 
48.
What is the equation to calculate time?
a)
time = speed/distance
b)
time = distance/speed 
c)
time = speed x distance 
d)
time = distance x speed
49.
What is the equation to calculate distance?
a)
distance = speed/time
b)
distance = time/speed
c)
distance = speed/distance
d)
distance = speed x time 
50.
A car travels 30 miles/hr for 3 hours, calculate the distance it will travel
a)
90 miles
b)
10 miles
c)
600 miles
d)
90 km
51.

Calculate the speed of a car that travels 200 meters in 20 seconds.

a)

5 m/s

b)

15 m/s

c)

25 m/s

d)

10 m/s

52.

A train travels at a speed of 60 km/h. How far will it travel in 3 hours?

a)

180 km

b)

200 km

c)

90 km

d)

120 km

53.

Draw a graph to represent the motion of a car accelerating from rest at a constant rate of 2 m/s^2 for 5 seconds. Calculate the acceleration of the car.

a)

5 m/s^2

b)

2 m/s^2

c)

10 m/s^2

d)

3 m/s^2

54.

A car starts from rest and reaches a speed of 20 m/s in 4 seconds. Calculate the acceleration of the car.

a)

15 m/s^2

b)

5 m/s^2

c)

25 m/s^2

d)

10 m/s^2

55.

Round 6.56 to 1 significant figure

(a)  

56.

Round 8.083 to 1 significant figure

(a)  

57.

Round 0.05775 to 2 significant figures

(a)  

58.

Round 394 to 2 significant figures

(a)  

59.

Round 52.061 to 3 significant figures

(a)  

60.

Round 497023.65 to 6 significant figures

(a)  

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