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6th Grade PS Ch 6
Test Description: Forces and Motion
Instructions: Answer all questions to get your test result.
1) Which of the following is NOT an example of projectile motion?
A
the path of a leaping frog
B
the path of a crate sliding along flat ground
C
the path of a pitched baseball
D
the path of an arrow through the air
2) If a tennis ball, a solid rubber ball, and a solid steel ball were dropped at the same time from the same height, which would hit the ground first? (assume there is no air resistance)
A
the solid steel ball would hit first
B
the tennis ball would hit first
C
all would hit at the same time
D
the solid rubber ball would hit first
3) Which of the following objects has the least acceleration?
A
a full shopping cart pushed with a light force
B
a full shopping cart pushed with a hard force
C
an empty shopping cart pushed with a hard force
D
an empty shopping cart pushed with a light force
4) When a moving bumper car collided with a bumber car at rest, which of the following occurs?
A
Momentum is transferred to the car at rest
B
there is not transfer of momentum
C
momentum is transferred to ground beneath the cars
D
momentum is transfered to the moving car
5) A crumpled piece of paper hits the ground before a flat sheet of paper because
A
the acceleration of gravity is greater on the crumpled paper.
B
the crumpled paper is less massive
C
there is more air resistance against the flat paper
D
the crumpled paper is more massive
6) Orbital motion is a combination of forward motion and
A
frictional resistance
B
weightlessness
C
free fall
D
horizontal acceleration
7) Assuming 1 kg = 1000 g, a 5 kg object has less inertia than an object with a mass of
A
6000 g
B
4 kg
C
1500 g
D
2 kg
8) According to Newton's first law of motion, a moving object that is not acted on by an unbalanced force will
A
change its momentum
B
accelerate
C
remain in motion
D
eventually come to a stop
9) A cue ball rolls toward a billiard ball with a velocity of 1.0 m/s east. Both balls have identical masses. What happens to the total momentum after the two balls collide?
A
it is equal to the momentum before the collision
B
it is greater than the original momentum of the cue ball
C
it is equal to zero
D
it is less than the original momentum of the cue ball
10) Why do astronauts in orbiting spacecraft appear weightless?
A
nothing in space exerts a force of gravity on the astronauts
B
the astronauts have no mass in space
C
the astronauts are in free fall along with the spaceship
D
the spaceship exerts equal force on an astronaut from all the sides
*select an answer for all questions
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