ACPS Forces, Motion, Gravity Mid-Unit Test

Four forces are acting on a box, as shown below.This box will increase in speed

• downward and to the left.
• downward and to the right.
• upward and to the left.
• upward and to the right.

Which graph shows acceleration(speeding up)?

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Kara pushes her big brother on a swing at the playground. After he gets off the swing, her little brother gets on. Kara finds that it is easier to push her little brother than it was to push her big brother.What is the MOST LIKELY reason for this?

• A smaller mass always moves faster than a larger mass.
• A smaller mass always moves slower than a larger mass.
• Less force is needed to move a larger mass the same distance.
• More force is needed to move a larger mass the same distance.

Which of the following objects are accelerating? 1) A cat jumped from a tree to chase the bird where his speed was 3 mph when he caught the bird. 2) A car beginning to drive away from the stop sign. 3) A runner turning down the side street to get home faster.

• 2
• 1 and 2
• 2 and 3
• all of them
• none of them

What type of force causes an ice skater to begin to move?

• balanced
• gravitational
• magnetic
• unbalanced

Which statement correctly compares an astronaut on Earth and on the Moon?

• The mass of an astronaut is greater on Earth than the Moon.
• The mass of an astronaut is greater on the Moon than on Earth.
• The weight of an astronaut is greater on Earth than the Moon.
• The weight of an astronaut is greater on the Moon than on Earth.

Using the graph, at what point did the car drive at a constant speed and at what point did the car completely stop?

• From 0-2 seconds (constant) & from 7-8 seconds (at rest)
• From 2-4 seconds (constant) & from 4-7 seconds (at rest)
• From 8-10 seconds (constant) & from 10-12 seconds (at rest)
• From 2-4 seconds (constant) & from 7-8 seconds (at rest)

Which of the following graphs shows negative acceleration?

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Which segment of the graph shows a constant speed returning to start?

• A
• B
• C
• D

Which of these is one of Newton’s laws of motion?

• An object’s momentum is the product of its mass and velocity.
• A moving object will continue moving until a force acts upon it.
• The force of gravity is proportional to the inverse square of the distance.
• The rate at which an object falls depends on the height from which it is dropped.