Download Forces and Motion Test 1

Forces and Motion Test 1
Do not write on the test.
1) The acceleration of an object would increase if there was an increase in the
A) mass of the object.
C) inertia of the object.
B) force on the object.
D) friction on the object.
2) Imagine you are on the top of a mountain with four basketballs. The mass of the four
basketballs are 100 kilograms, 200 kilograms, 300 kilograms, and 400 kilograms. If the
basketballs rolled down the hill, which one would supply the greatest force at the bottom of
the mountain?
A) 100 kilogram basketball
C) 300 kilogram basketball
B) 200 kilogram basketball
D) 400 kilogram basketball
3) Mutt and Jeff are running along a path each pushing a cart loaded with rocks. If Mutt's
wagon has a mass two times greater than Jeff's and they want to arrive at their destination at
the same time, what must happen?
A)
Jeff should slow down so Mutt can
catch up.
C)
Mutt must use twice as much force
to push his cart.
B)
Mutt must use half as much force to
push his cart.
D)
Mutt and Jeff will use the same force,
but Mutt will take bigger steps.
4) In baseball, a home run means the batter has hit the baseball into the stands, beyond the
baseball field. Compare the force of the batter when bunting the ball into the in-field versus
hitting a grand slam.
A)
There is no way to estimate the
batter's force.
C)
The force of the batters in each case
is about the same.
B)
The force is much less when bunting
into the in-field.
D)
The force of the batter is much less
when hitting the ball out of the park.
5) If you had to throw one of the four toys above, which one
would take the MOST force to throw?
A) baseball
C) football
B) basketball
D) yoyo
Yoyo -57 grams
Football - 400 grams
Baseball - 145 grams
Basketball - 6237 grams
6) If Shane and Susan both push on a box with a force of 25N, but in opposite directions, what
will happen to the box?
A) The box will not move.
C) The box will slide toward Susan.
B) The box will slide toward Shane.
D)
The box will perpendicular to both Shane and
Susan.
7) Two forces are acting on a wheelbarrow. One force is pushing to the right and an equal
force is pushing to the left. What can you say about the wheelbarrow's movement?
A) It is slowing down.
C) It is moving faster and faster.
B) It is balanced.
D) Its speed is changing at a constant rate.
8) The image shows two opposite forces
acting on a rope. What can we say is true
if the forces on each side of the rope are
doubled to 150 Newtons?
A) It cannot be determined without
knowing which man is stronger.
B) The forces are not balanced, because one man is standing taller than the other.
C) The forces are balanced. But, the forces acting on the rope have increased and the
rope’s motion is affected.
D) The forces are balanced. There is no change in forces acting on the rope and the rope’s
motion is not affected.
9) When a moving object is acted on by unbalanced
forces, the object will
A) stop moving.
B) move in unpredictable patterns.
C) move in the same direction as the stronger force.
D) move in the direction opposite the stronger force.
10) When the net force of opposite forces is zero, the forces are
A) not even.
B) unequal.
C) unbalanced.
D) balanced.
11) Which example best represents an object with balanced forces acting upon it?
A)
A boat moving through the water.
C)
A wagon rolling down a steep hill.
B)
A book sitting on a high shelf.
D)
A baseball thrown thrown in the air.
12) Which example best demonstrates how unbalanced forces change the speed of an object's
motion?
A) A child on a bicycle braking at a stop sign.
B) A child singing a song.
C) A child sitting in a chair reading a book.
D) A child walking around the corner of a school hallway.
13) What must occur to a shopping cart at rest in order to make it roll forward?
A) A force must be provided to overcome gravity.
B) Balanced forces must be acting on the cart.
C) An unbalanced force applied to the cart pushing or pulling it forward.
D) The unbalanced force acting upon it must be smaller than that of friction.
14) The net force on the box is
A) 2 Newtons to the left.
B) 10 Newtons to the right.
C) 10 Newtons to the left.
D) 20 Newtons to the right.
15) Describe the motion of the box on the right.
A) The box will not move.
B) The box will move to the left.
C) The box will move to the right.
D) The box will move to the left and then to the right.
16) You are sitting in a car that isn't moving; suddenly, the car quickly accelerates. Your body
seems to be pushed back against the seat. Which word best explains why your body seemed
to be pushed backward against the seat?
A) newton
B) vector
C) inertia
D) gravity
17) Which of these is a good example of Newton's First Law of inertia?
A) a ball sits still on the ground.
B) a ball gains speed as it rolls downhill.
C) a ball accelerates as it falls off of the roof.
D) a ball returns to your hand after you throw it up in the air.
18) A cup of coffee sits on the dashboard of an automobile. The car goes around a sharp curve.
Even though you hold the cup still, coffee still splashes out. This can best be explained due to
A) density.
B) friction.
C) gravity.
D) inertia.
19) You are holding a full bowl of hot soup while standing in the kitchen. As you begin moving,
some of the soup spills out of the bowl onto the floor. Upon reflection, you realize that
A) the soup spilled because of air resistance.
B) if you had traveled faster this wouldn't have happened.
C) the soup wanted to stay where it was, but you moved the bowl.
D) the soup and the bowl act as one body with the same velocity.
20) Which situation is the BEST example of inertia?
A) An old lady uses a walker and is able to cross the street.
B) A rocket thrusts its boosters and lifts off the launching pad.
C) A rock is thrown vertically up in the air and it falls back to the earth.
D) You go down a steep roller coaster and it feels like your stomach is going up into your
throat.
21) According to Newton's Third Law, what is the equal and opposite force
to the downward force of gravity pulling on a man standing on the ground?
A) the man pulling upward on the earth
B) the force of friction holding the man still
C) the pull of the sun keeping the earth in orbit
D) the surrounding air pressure keeping the man in equilibrium
22) Which would BEST describes what occurs when a ball is thrown against a wall?
A) The ball will not bounce off the wall.
B) The ball hits the wall hard enough to bounce off of it.
C) The wall is stronger than the ball and neither exerts any forces.
D) The ball exerts a force on the wall and the wall exerts a force back.
23) Robert decides it would be fun to jump off of the back of his canoe while fishing in the lake
one day. After he jumps out of the canoe, he notices that the canoe has moved away from
where he jumped. Which statement BEST explains why this occurred?
A) An object at rest stays at rest.
B) An object in motion stays in motion.
C) For every action, there is an equal and opposite reaction.
D) The acceleration of an object is determined by the weight of the object and the force
applied to it.
24) Marvin blows up a balloon but lets go of it. The air inside is released and
the balloon goes up into the air. What best describes what happens?
A) Gravity pushes the balloon into the air.
B) Drag is caused by contact of the balloon with the air.
C) Lift lowers the air pressure on the top of the balloon.
D) The air pushes the balloon in the opposite direction.
25) Newton's third law of motion states “For every action there is an equal and opposite
reaction”. Which model BEST represents this law of motion?
A)
C)
250 N
250 N
B)
D)
26) In canoeing, you paddle backward to go forward. Which statement BEST explains canoeing
using Newton’s third law of motion?
A) The water transfers energy to the boat to make it move.
B) Once the boat is moving forward, it will naturally continue to move forward.
C) As the paddle pushes the water backward, the water pushes the paddler forward with an
equal force.
D) The body of water has a larger mass and will exert a larger force on the paddle then the
paddle.
Use this picture to answer questions 27-28.
27) The air leaves the balloon in one direction; the car moves in the opposite direction. This
balloon car illustrates for action, there is an equal and opposite reaction or
A) the law of gravity.
B) Newton’s 1st law of motion.
C) Newton’s 2nd law of motion.
D) Newton’s 3rd law of motion.
28) The toy car in the picture is propelled forward by
A) the weight of the car.
B) the force of the car on gravity.
C) the friction of the wheels on the car.
D) the reaction force of the air on the car.
1. B
2. D
3. C
4. B
5. B
6. A
7. B
8. D
9. C
10.D
11.B
12.A
13.C
14.C
15.A
16.C
17.A
18.D
19.C
20.D
21.A
22.D
23.C
24.D
25.A
26.C
27.D
28.D
8.P.2A.1
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