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Force And Motion 2

Test Description: Test review part 2

Instructions: Answer all questions to get your test result.

1) Friction occurs because of

Athe roughness of an object's surface Bonly the weights of any two objects Conly the masses of any two objects Dunbalanced forces

2) A hiker's velocity changes from 1.8 m/s uphill to 1.5 m/s uphill. How do you know they have a negative acceleration?

Ahis speed decreased Bhis direction changed Chis direction did not change Dhis speed increased

3) In which of the following is a skater NOT accelerating?

Agoing straight and speeding up Bgoing in circles Cgoing straight at a constant speed Dgoing straight and slowing down

4) A student has a weight of 420N on Earth. What is his weight on the moon? (Moon's gravity is 1/6 of Earth's)

A2520N B70kg C2520kg D70N

5) An unbalanced force can cause an object's motion to change by...

Achanging direction or speed; stopping but not starting motion Bchanging direction or speed; starting but not stopping motion Cchanging direction or speed only Dchanging direction or speed; starting or stopping motion

6) The law of universal gravitation says that gravitational force is...

Arelated to weight and friction Brelated to weight and distance Crelated to mass and friction Drelated to mass and distance

7) To produce change in motion, a force must be an

Africtional force Bgravitational force Cbalanced force Dunbalanced force

8) The gravitational pull is greater between 2 objects that

Ahave rougher surfaces Bare moving at greater speed Care farther apart Dhave greater masses

9) What is an object that appears to stay in place that helps you detect motion in another object?

Athe sky Breference point Cnewton Da shoe

10) dividing the total distance traveled by the total time is how to calculate...

Aacceleration Bmotion Cspeed Dvelocity

*select an answer for all questions

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