WorksheetsENERGY
Total questions: 25
Worksheet time: 16mins
Name
Class
Date
1.
A 1200 kg car and a 2400 kg car are lifted to the same height at a constant speed in a auto service station. Lifting the more massive car requires ____ work.
a)
a. less
b)
b. the same
c)
c. twice as much
d)
d. four times as much
2.
An arrow is drawn back so that 50 Joules of potential energy is stored in the stretched bow and string. When released, the arrow will have a kinetic energy of ____ Joules.
a)
a. 50
b)
b. more than 50
c)
c. less than 50
3.
A 1000-kg car is moving at 40.0 km/hr when the driver slams on the brakes and skids to a stop (with locked brakes) over a distance of 20.0 meters. How far will the car skid with locked brakes if it is traveling at 120. km/hr?
a)
a. 20.0 m
b)
b. 60.0 m
c)
c. 90.0 m
d)
d. 180.m
4.
The biggest use of energy in the typical US home is?
a)
a. Home electronics
b)
b. Water heating showers or laundry
c)
c. Space heating heating the house
d)
d. Lighting
5.
Which single technology can provide our society with a seamless transition to cheap, safe and carbon-free energy?
a)
a. Electric cars
b)
b. Concentrating solar power
c)
c. Nuclear power
d)
d. None of the above
6.
Which part of the lever is the part you are trying to move?
a)
a. load
b)
b. effort
c)
c. fulcrum
7.
A blank is a machine used to hold two objects together.
a)
a. pulley
b)
b. lever
c)
c inclined plane
d)
d. screw
8.
How many simple machines are there?
a)
a. four
b)
b. five
c)
c. six
d)
d. seven
9.
An object being lifted or moved by a machine is a?
a)
a. fulcrum
b)
b. load
c)
c. work
d)
d. force
10.
How much of the US energy use is supplied by renewable forms of energy?
a)
a. 1.3%
b)
b. 4.4%
c)
c. 9.8%
d)
d. 12.8%
11.
Which part of the lever supplies the force to move something?
a)
a. effort
b)
b. fulcrum
c)
c. load
12.
Decreasing the slant of an inclined plane increases its?
a)
a. effort force
b)
b. Mechanical Advantage
c)
c. Power
d)
d. Work output
13.
A knife is an example of an
a)
a. Inclined Plane
b)
b. Wedge
c)
c. ramp
d)
d. pulley
14.
The efficiency of a simple machine.
a)
a. is always less than 100%
b)
b. is equal to 100%
c)
c. is always 50%
d)
d. is always more than 100%
15.
A pulley system has 3 sections of ropes that lift the load. The mechanical advantage of the system is ?
a)
a. 0
b)
b. 1
c)
c. 2
d)
d. 3
16.
A simple machine that is actually a kind on inclined plane is a ?
a)
a. pulley
b)
b. wedge
c)
c. gear
d)
d. balance
17.
A wheel barrow is an example of a blank class lever.
a)
a. third
b)
b. fourth
c)
c. second
d)
d. first
18.
Which part of the lever is the part you are trying to move?
a)
a. fulcrum
b)
b. effort
c)
c. load
19.
Which simple machine makes up a pencil sharpener?
a)
a. lawn tractor
b)
b. pulley
c)
c. inclined plane
d)
d. wheel and axle
20.
Which simple machine does a flagpole make use of?
a)
a. screw
b)
b. pulley
c)
c. inclined plane
d)
d. lever
21.
What should you do to reduce the amount of effort needed to lift something using a first class lever?
a)
a. move the fulcrum closer to the load
b)
b. move the fulcrum to the middle of the lever
c)
c. move the fulcrum closer to the effort
22.
A 40 newton object is released from a height of 10 m. Just before it hits the ground, its kinetic energy, in joules is?
a)
a. 400
b)
b. 3920
c)
c. 2800
d)
d. 4000
23.
Work done = Force x blank?
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
24.
Which form of energy does the flowing water possess?
a)
a. gravitational energy
b)
b. potential energy
c)
c. electrical energy
d)
d. kinetic energy
25.
A coolie carries a load of 500 N to a distance of 100 m. The work done by him is?
a)
a. 5 N
b)
b. 50,000 Nm
c)
c. 0
d)
d. 1/5 N
100 %
