Unit Test — Unit test Answers
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A tuna fish body is streamlined to reduce friction. Which describes the type of friction the fish must overcome?
A
kinetic frictionB
rolling frictionC
static frictionD
fluid friction22
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Jasper and Gemma are going to play on a teeter totter. Gemma gets on first. When Jasper gets on, Gemma moves into the air, but she does not move to the top.
A
The forces are balanced because Jasper weighs the same as Gemma.B
The forces are unbalanced because Jasper weighs the same as Gemma.C
The forces are balanced because Jasper weighs more than Gemma.D
The forces are unbalanced because Jasper weighs more than Gemma.23
A bowling ball has a mass of 7.2 kg and a weight of 70.6 N. It moves down the bowling alley at 1 m/s and strikes a pin with a force of 15.0 N. What is the force that the pin exerts on the bowling ball?
A
7.2 NB
15.0 NC
70.6 ND
85.6 N24
Which best explains parallel forces?
A
left and right forces that can be added togetherB
right and upward forces that cancel each other outC
addition of parallel forces that cannot result in a negative forceD
left and downward forces that cancel each other out25
Which factors affect the gravitational force between two objects?
A
distance and velocityB
mass and distanceC
mass and weightD
acceleration and weightDid you find these answers helpful?
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