A wheeled cart is moving to the right at a constant speed. Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?

Balanced Forces, Constant Speed

Unbalanced Forces, Constant Speed

Unbalanced Forces, Acceleration

Why does a book on a table not move?

Forces of the table pushing up and gravity pulling down are balanced

No forces are acting on the book

Gravity is the only force acting on the book

Which answer choice best explains why tractor trailers take more time to speed up & slow down than regular cars?

Tractor trailers have more mass and require more force to move.

Tractor trailers have less mass and require less force to move.

Tractor trailers have less mass and require more force to move.

Tractor trailers have more mass and require less force to move.

The unusual strength of a glue makes it able to hold a heavy object, or load, as shown in the diagram. If the load exerts a strong downward force, the glue -

exerts an upward force that is equal to the downward force

exerts a stronger downward force

causes the load to accelerate upward

Two forces are applied to a 17 kg box, as shown. The box is on a smooth surface. Which statement best describes the acceleration of the box?

The box accelerates at 1.0 m/s 2 to the right because the net force is 17 N to the right.

The box accelerates at 1.9 m/s 2 to the right because the grater force is to the right.

The box accelerates at 3.0 m/s 2 because the combined forces cause the box to accelerate.

The box does not accelerate, because neither force is large enough to move the box.

The list includes six situations. Which objects in the list experience an unbalanced force?

The can, the swing, and the bird

The book, the ball, and the car

The ball, the car, and the bird

The book, the ball, the can, and the swing

The diagram shows two different forces acting on a cyclist riding a bicycle. The total mass of the cyclist and the bicycle is 100.0 kg. Based on this information, what is the acceleration of the cyclist?

0.66 m/s 2 forward, because the applied force is greater than the force of the air

0.66 m/s 2 backward, because the force of the air slows the cyclist down

2.3 m/s 2 backward, because the forces are opposite and not equal

2.3 m/s 2 forward, because the cyclist's inertia is greater than the force of the air

8.6 a, b, c Test

Authored by Greg Muncy

Physics

8th Grade

NGSS covered

Used 61+ times

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

65mi/hr South is an example of...

Speed

Velocity

Acceleration

Direction

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Find the net force: 15 N to the right, and another 15 newtons to the right.

0 N Right

0 N Left

30 N Left

30 N Right

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Forces that have a net force of zero ( the object is still).

Balanced force

Unbalanced force

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the unit of measurement for force?

AMP

Seconds

Newtons

Miles

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NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What will cause an object to move?

Applied forces

Balanced forces

Unbalanced forces

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NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Balanced or Unbalanced?

Balanced

Unbalanced

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

If an object is not moving the forces acting upon it are _____________

unbalanced

weak

balanced

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8.6 a, b, c Test

65mi/hr South is an example of...

Find the net force: 15 N to the right, and another 15 newtons to the right.

Forces that have a net force of zero ( the object is still).

What is the unit of measurement for force?

What will cause an object to move?

Balanced or Unbalanced?

If an object is not moving the forces acting upon it are _____________

Calculate the Net Force.

Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?

Are forces balanced or unbalanced when a marble rolls down a ramp?

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