A sled sliding on a flat, icy surface with a constant velocity is best described by

Newton’s first law of motion for objects in motion.

Newton’s first law of motion for objects at rest.

Newton’s second law of motion.

Newton’s third law of motion.

Acceleration is caused by a force acting on a mass.

Newton’s second law of motion

A person steps out of the boat and onto the dock. As the person moves forward onto the dock, the boat moves backward. Which statement best describes the backward motion of the boat as the person steps forward?

For every action there is an equal and opposite reaction.

Every mass exerts a force on every other mass.

An object at rest tends to stay at rest.

Friction opposes the motion of an object.

If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration? (F=ma)

The one with a mass of .52 kg will have the greatest acceleration.

The one with a mass of .78 kg will have the greatest acceleration.

They will both accelerate at the same rate.

A crumpled piece of paper hits the ground before a flat sheet of paper because

there is more air resistance against the flat paper.

the acceleration of gravity is greater on the crumpled paper.

the crumpled paper is more massive

the crumpled paper is less massive.

What is the definition of "weight"?

the force in which gravity pulls on an object

the time it takes to get on a ride

the amount of matter in an object

An object will not have any inertia if it is _?_

… Nonsense! All objects have inertia

Newton's second law states that F=ma (force is mass times acceleration) which example would have the GREATEST?

a 10 kg ball thrown with a 50 N force

a 1 kg ball thrown with a 0.5N force

a 50 kg student launched by a 100 N catapult

a) a 500 kg car accelerated by 1000 N from the engine

To test Newton’s law of gravity, Ben and Jerry climbed the football stadium at school and dropped an egg from the very top of the bleachers. Their egg dropped data can be seen in the table According to this data, What conclusion can the boys make regarding Newton’s law of gravity?

a) The acceleration due to gravity of 9.8 m/s2 is supported

a) No conclusion can be drawn from the data

a) The acceleration due to gravity is not constant

a) The acceleration due to gravity of 9.8 m/s2 is refuted

Which of these best describes why your weight (on Earth) would change on another planet?

different planets have different gravitational pulls

weight doesn’t change, no matter where you are

In general, the smaller the planet, the greater weight

dehydration effects on different planets change weight

Suppose you are conducting an experiment concerning gravities effects on falling objects, and you want to minimize air resistance. Which of these would be the most useful and practical way to do these?

conduct the experiment in vaccum

conduct the experiment at various altitudes

Mr. Hardens class decides to perform an experiment to determine how long it takes different objects to hit the floor when dropped from a desk. The class dropped 3 balls from a desk, one weighing 2 lbs, one weighing 4 lbs and 6 lbs. It took them all the same amount of time to hit the floor. After evaluation these results, you predict that a 10 lb ball will take

about the same amount of time to hit the floor

an unknown amount of time before hitting

What was Charlie doing between 8 seconds and 10.5 seconds?

He was traveling at a constant velocity

how much distance is covered over a period of time

the change in the location of a object

Physical Science Review

Authored by Charles Martinez

Physics

8th Grade

NGSS covered

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45 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The correct equation to calculate speed is

distance/time

time/distance

distance x time

distance/time²

Shona cycles at an average speed of 8km/h. How far has she travelled if she cycles for 4 hours?

55km

32km

43km

32miles

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How far will a person go if they jog for 2 hours at a speed of 12 km/hr?

6 km

0.5 km

10 km

24 km

MULTIPLE CHOICE QUESTION

1 min • 1 pt

You walk 10 meters to math class in 20 seconds. Your average speed is

2 m/s

0.5 m/s

200 m/s

5 m/s

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If a cheetah runs 180 miles in 3 hours, what is its average speed?

60 hours

60 miles

60 miles/hour

60 miles/second/second

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

A runners races in the 100 meter dash. It takes her 10 seconds to finish. What is her average speed?

10 m/s

1000 m/s

100 seconds

10 seconds

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The graph represents

no motion

Constant velocity

Acceleration

negative acceleration

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Physical Science Review

The correct equation to calculate speed is

Shona cycles at an average speed of 8km/h. How far has she travelled if she cycles for 4 hours?

How far will a person go if they jog for 2 hours at a speed of 12 km/hr?

You walk 10 meters to math class in 20 seconds. Your average speed is

If a cheetah runs 180 miles in 3 hours, what is its average speed?

A runners races in the 100 meter dash. It takes her 10 seconds to finish. What is her average speed?

The graph represents

Find the velocity of a truck that travels 75 miles north in 2.5 hours.

Find the velocity of a plane that traveled 3000 miles west in 5 hours.

How far will a person go if they jog for 2 hours at a speed of 12 km/hr?

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