Two ice skaters push off of one another. One of the ice skaters is twice as massive as the other. Which of the following is true?
Select one:
a. The force of the more massive skater on the less massive skater is larger than the force of the less massive s
The force of the more massive skater on the less massive skater is equal to the force of the less massive skater on the more massive skater.
Velocity is the same thing as speed along with the direction the object is travelling.
Select one:
True
False
True
How does acceleration of an object occur?
Select one:
a. A net force is applied to the object.
b. The inertia of the object causes acceleration.
c. The velocity of the object changes.
d. Two equal but opposite forces act on the object.
A net force is applied to the object.
Which of the following terms describes an object's resistance to a change in motion?
Select one:
a. momentum
b. force
c. inertia
d. acceleration
inertia
The following question deals with an action/reaction pair. Action: as you step off a curve, the Earth pulls you downward. What is the reaction?
Select one:
a. You accelerate toward the Earth.
b. Your body pulls the Earth in the upward direction.
c. Both a
Your body pulls the Earth in the upward direction.
Objects at rest tend to stay at rest because of
Select one:
a. the force of gravity acting on them.
b. inertia
c. friction between the object and the ground
d. the natural tendency of all objects is to be at rest, according to Aristotle.
inertia
A car moves past you on a straight road at a steady speed of 100 miles/hr. It has a large acceleration.
Select one:
True
False
Flase
Which of the following situations will result in the greatest acceleration?
Select one:
a. A small force acting on a large mass.
b. A large force acting on a large mass.
c. A large force acting on a small mass.
d. A small force acting on a small mass.
A large force acting on a small mass.
Which of the following objects will have the greatest acceleration?
Select one:
a. 10 N force acting on a 2 kg object.
b. 2 N force acting on a 10 kg object.
c. 5 N force acting on a 5 kg object
d. 5 N force acting on a 2 kg object.
10 N force acting on a 2 kg object.
If you are travelling in a circle with your cruise control set at 50 miles/hr your velocity is constant.
Select one:
True
False
False
How many controls on a car can cause an acceleration?
Select one:
a. 1
b. 2
c. 3
d. 4
3
If you drag a block on a table to the right at constant speed with a string tied to a scale and the scale reads 3 N, then the force of friction is
Select one:
a. equal to 3 N
b. less than 3 N
c. more than 3 N
d. more information is needed
equal to 3 N
Use the Free Fall How Far video to answer the following problem. Use g=10 m/s2. A ball is dropped from a tall building and falls for 5 seconds. How far has it fallen during that time? Ignore air resistance.
Select one:
a. 250 m
b. 125 m
c. 25 m
d. 50 m
125 m
The physics equations used this week ignore friction.
Select one:
True
False
True
Acceleration is how fast you move from one position to another.
Select one:
True
False
False
Aristotle and Galileo had very similar descriptions of motion but at different times.
Select one:
True
False
False
Acceleration occurs when which of the following happen?
Select one:
a. speeding up
b. slowing down
c. changing direction
d. choices a and b
e. choices a, b, and c
choices a, b, and c
A pitcher is able to accelerate a baseball because the force of the pitcher's hand on the ball that is greater than the force of the ball on the pitcher's hand.
Select one:
True
False
'False'.
Speed and velocity use the same symbol and units.
Select one:
True
False
True
If you travel 300 miles in 2 hours what is your speed?
Select one:
a. 150 miles/hr
b. 300 miles/hr
c. 600 miles/hr
d. 2 miles/hr
150 miles/hr