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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 Newton in England
B
by an astronaut on the moon
C
by an astronaut on the space shuttle
D
by Galileo in Italy
2) An object is in projectile motion if
A
it does not accelerate horizontally
B
it is accelerated downward by gravity
C
it is thrown with a horizontal push
D
All of the above
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
a solid rubber ball
D
They would all hit at the same time
4) Galileo proved that the rate at which an object falls
A
increases with a decrease in mass
B
is not affected by the mass
C
decreases with an increase in mass
D
increases with an increase 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
stays at 9.8 m/s
C
decreases by 9.8 m/s
D
None of the above
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
9.8 m/s
B
29.4 m/s
C
19.6 m/s
D
0 m/s
7) Air resistance is
A
rolling friction
B
sliding friction
C
fluid friction
D
static 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
mass and weight
D
size and shape
9) Astronauts float inside the space shuttle because they
A
are massless
B
are weightless
C
are in free fall
D
have no gravitational force acting on them
10) An orbit is formed when the shuttle
A
is in free fall
B
is pulled down by gravity
C
All of the above
D
Moves forward
*select an answer for all questions
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