An object in motion will stay in what kind of motion as long as the net forces acting on it are zero?

constant motion in a straight line

slowing motion in a straight line

accelerating motion in a straight line

constant motion in an unpredictable direction

Choose the BEST example of balanced forces.

a car moving at a constant speed

a tennis ball bouncing back and forth between players.

The 5th graders were playing a game of tug-of-war. The class was divided equally with half the class on one side of the rope and the other half on the opposite side. For 5 minutes the students pulled and pulled but neither side could pull the flag to one side or the other. Choose the description of the forces during the 5th grade tug-of-war.

The forces were balanced in the game.

The forces were unbalanced in the game.

The forces were friction, gravity, and chemical energy.

The students all had the same amount of strength.

An unbalanced force can make all of these things happen except...

a moving object changes direction

Balanced forces can cause

an object to stay still or move at a constant speed and direction

an object to speed up or slow down

Which could be an example of an unbalanced force?

A baseball that has been thrown to home plate.

A plate sitting on a dining table

A ball at the top of a hill that is not moving

A girl is pushing a cart by herself with a force of 7 N. What will happen if a boy begins to help her and their combined force is 17 N?

The cart will move at a constant speed in a straight line.

The cart will fly to never never land!

How does friction affect speed?

less friction doesn't affect speed

Balance and Unbalance forces

Authored by Laketia Allen-Davis

Science

5th - 8th Grade

NGSS covered

Used 62+ times

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30 questions

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MULTIPLE CHOICE QUESTION

3 mins • 1 pt

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

Balanced Forces, Acceleration

Unbalanced Forces, Constant Speed

Unbalanced Forces, Acceleration

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

According to Newton’s Law of Inertia, an object that is moving will change its motion only if what kinds of forces act on it?

Constant forces

Unbalanced forces

Unbalanced forcesStrong forces

Gravitational forces

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?

60 N right

10 N left

60 n right

50 N left

Tags

CCSS.HSN-VM.B.4A

CCSS.HSN-VM.B.4B

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the net force?

20 N

0 N

400 N

40 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

If these teams are pulling with the same amount of force what will happen?

The boy in blue will win.

They will not move at all.

The boy in red will win.

Both will fall down.

Tags

NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the net force?

400 N Up

400 N Down

- 400 N Down

800 N Down

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

3 mins • 12 pts

At which point is potential energy greatest?

Tags

NGSS.MS-PS3-2

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Balance and Unbalance forces

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?

According to Newton’s Law of Inertia, an object that is moving will change its motion only if what kinds of forces act on it?

You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?

What is the net force?

If these teams are pulling with the same amount of force what will happen?

What is the net force?

At which point is potential energy greatest?

A boat is traveling 1200N north, and the frictional force acting on it is 800N. What is the net force and is the velocity changing or staying the same?

Why is there less friction between two ice cubes touching than between sandpaper on wood?

In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N. What is the net force?

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