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Forces In Motion - Lesson 1
Test Description: This is covering lesson 1
Instructions: Answer all questions to get your test result.
1) A feather and a rock dropped at the same time from the same height would land at the same time when dropped
A
by an astronaut on the moon
B
by an astronaut on the space shuttle
C
by Galileo in Italy
D
by Newton in England
2) An object is in projectile motion if
A
it is thrown with a horizontal push
B
it does not accelerate horizontally
C
All of the above
D
it is accelerated downward by gravity
3) If three balls of different matrials were dropped at the same time form the same height, which would hit the ground first? (Assume there is no air resistance.)
A
a tennis ball
B
a solid steel ball
C
They would all hit at the same time
D
a solid rubber ball
4) Galileo proved that the rate at which an object falls
A
is not affected by the mass
B
increases with an increase in mass
C
decreases with an increase in mass
D
increases with a decrease in mass
5) All objects accelerate toward the Earth at a rate of 9.8 m/s/s. This means that for every second that an object falls, its downward velocity
A
increases by 9.8 m/s
B
None of the above
C
decreases by 9.8 m/s
D
stays at 9.8 m/s
6) A ball is dropped from a rooftop. What is the ball's velocity after 3 s? (Assume that there is no air resistance)
A
29.4 m/s
B
9.8 m/s
C
19.6 m/s
D
0 m/s
7) Air resistance is
A
sliding friction
B
static friction
C
fluid friction
D
rolling friction
8) The amount of air resistance acting on an object depends on the object's
A
None of the above
B
density and mass
C
size and shape
D
mass and weight
9) Astronauts float inside the space shuttle because they
A
have no gravitational force acting on them
B
are weightless
C
are in free fall
D
are massless
10) An orbit is formed when the shuttle
A
Moves forward
B
All of the above
C
is pulled down by gravity
D
is in free fall
*select an answer for all questions
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