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