Download Newton`s Laws Summative Assessment

S t u d e n t
h a n d o u t
Name____________________________________________________________________________________________________
Newton’s Laws
Summative Assessment
Circle the letter that represents the best answer.
1. When two equal forces act in opposite directions on an object, they are called ______________________.
a. friction forces
b. balanced forces
c. centripetal forces
d. gravitational forces
2. When an unbalanced force acts on an object, the force ______________________.
a. changes the motion of the object
b. is canceled by another force
c. does not change the motion of the object
d. dis equal to the weight of the object
3. The resistance of an object to any change in its motion is called ______________________.
a. inertia
b. friction
c. gravity
d. weight
4. According to Newton’s second law of motion, force is equal to mass times ______________________.
a. inertia
b. weight
c. direction
d. acceleration
5. The product of an object’s mass and its velocity is called the object’s ______________________.
a. net force
b. weight
c. momentum
d. gravitation
33
S t u d e n t
h a n d o u t
Answer true or false. If the statement is true, write “true as written.” If it is false, change the underlined word or words and make the
statement true.
6. According to Newton’s third law of motion, whenever you exert a force on an object, the object exerts a force back on you that
is greater than your force.
7. Mass is a measure of the amount of force an object has.
8. Weight is the measure of the force of gravity exerted on an object.
9. Conservation in science refers to the amount of some quantity before and after an event.
10. The force that causes a satellite to orbit Earth is gravity.
34
S t u d e n t
h a n d o u t
Circle the letter that represents the best answer.
11. Inertia is Newton’s law that says that an object will ______________________.
a. stay at rest or stay in motion
b. resist all forces
c. overpower all forces
d. roll in space forever
12. A push or a pull is called a ______________________.
a. motion
b. Newton’s Law
c. force
d. constant speed
13. For every action there will be a punishment ______________________.
a. a punishment
b. a reward
c. a speed
d. an equal and opposite reaction
14. Action and reaction forces are discussed in ______________________.
a. math books
b. Newton’s third law of motion
c. coffee shops
d. Newton’s first law of motion
15. The rate at which velocity changes is ______________________.
a. never predictable
b. affected by gravity
c. acceleration
d. hard to measure
35
S t u d e n t
h a n d o u t
Solve for the variables and answer the questions.
16. How much force would it take to accelerate a 75-kg object by 5 m/s2?
17. How much force would it take to accelerate a 40-kg object by 3 m/s 2?
18. What is the mass of an object if it takes 25 N to accelerate the object 0.25 m/s 2?
36
S t u d e n t
h a n d o u t
19. What is the mass of an object that is hit with a force of 32 N and moves with an acceleration of 4 m/s2?
20. If you travel to the moon and step on a scale, your weight will change from what is was on Earth, but your mass will stay the
same. Please explain why this is true.
37