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Science Quiz Ch. 4
Name: ________________
Matching Place the correct letter matching the word to the “definition”.
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1. Weight ________
A: The amount of matter in an object
2. Energy ________
B: action-at-a-distance force
3. Gravity ________
C: The force of gravity on an object
4. Friction ________
D: The ability to do work
5. Mass
E: A force that opposes the motion of an object
________
Multiple Choice Circle the correct Response
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1. Forces can be classified into two different groups. They are:
A: friction and contact forces
B: contact and action-at-a-distance forces
C: weight and mass
D: friction and action-at-a-distance forces
2. Which of the following forces transforms kinetic energy into thermal energy?
A: gravitational force
B: magnetic force
C: electrical force
D: frictional force
3. In which of the following ways does a machine not make work easier:
A: By decreasing the distance over which the force is applied
B: By increasing the force that can be applied to an object
C: By increasing the distance over which the force is applied
D: By changing the direction of a force
Use the graph for questions 4 and 5
4. The correct statement regarding Planet C is:
A: An astronaut on Planet C would weigh more than on Earth
B: The gravitational field on Planet C is less than Planet A
C: The mass of an astronaut on Planet C is greater than on Earth
D: An astronaut on Planet C would weigh less than on Earth
5. The correct statement regarding the three planets is:
A: The gravitational field on Earth is greater than Planet C
B: The gravitational field on Planet A is greater than on Planet C
C: The gravitational field on Earth is greater than Planet A
D: The mass of Earth is greater than Planet A
True or False
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1. _______
Mechanical Advantage is usually lower than Ideal Mechanical Advantage
2. _______
The metric (SI) unit for weight is pounds
3. _______
We can weigh items using a “fall scale”
4. _______
It is impossible to create or destroy energy
5. _______
A fixed pulley does not increase nor decrease mechanical advantage but
does change the direction of the force.
Word Problems SHOW ALL WORK!!! Each question is worth 3 marks. (
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1. Determine the force of gravity acting on a 450g object on Jupiter’s surface. The
gravitational field strength of Jupiter is 22.8 N/kg (m/s2).
2. A crane uses 980 N of force to move a concrete block to a vertical height of 25 m.
Determine the work done by the crane.
3. Determine the gravitational potential energy of an object that was lifted 3m and has
a mass of 8kg.
4. Determine the distance that a car moved if the engine exerted a force of 1000 N and
50000 J of work was done.
5. Determine the ideal mechanical advantage of a hammer that is used to remove a nail
if the output distance if 2.5 cm and the input distance is 10 cm.
Bonus: The worst baseball prospect has the nickname ‘Kinetic Joe’. They call him that
because he lacks ________________________.
Use space below for rough work or thinking if needed