Which objects experience an unbalanced force?

The can, the swing, and the bird.

How can Newton's Law of Action-Reaction best be applied to explain the movement of a rocket?

As the fuel burns, gases push the rocket moving it upward.

A leaf fell out of a tree. Which tells why it didn't fall straight down?

Air currents & gravity applied changing & unbalanced forces

Two forces are applied to a 17 kg box. It has a smooth surface. Which is true?

The box accelerates at 1.0 m/s/s to the right.

A meteor moving 468 km per minute It was only 45 m wide and was 27,700 km above Earth's surface

Its velocity was 7.8 km/s northward.

A student graphed the position of a cart during a 7 second time interval. Which is true?

The cart moved at a constant velocity for the entire time.

If the load exerts a strong downward force, the glue...

exerts an upward force that is = to the downward force.

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8th Grade Science Physics Newton's Laws force and motion

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Questions 13

Answers

1
Which objects experience an unbalanced force?
The book, the ball, the can, and the swing.
The ball, the car, and the bird.
The book, the ball, and the car.
The can, the swing, and the bird.
2
How can Newton's Law of Action-Reaction best be applied to explain the movement of a rocket?
As the fuel burns gases move out of the rocket to reduce air
As the fuel burns, gases push the rocket moving it upward.
As fuel burns, the mass of the rocket decreases.
As the fuel burns, the rocket moves faster.
3
A leaf fell out of a tree. Which tells why it didn't fall straight down?
Upward force of air greater than downward force of gravity
Air currents & gravity applied changing & unbalanced forces
It was moving it kept moving same direction bc it balanced
Objects with irregular shapes never fall in straight lines.
4
engine gave off particles to change velocity mass of 500kg engine created a net force of 0.10N?
F 0.10 N/500 kg
500 kg/0.10 N
500 kg (x) 0.10 N
500 kg + 0.10 N
5
How many seconds did it take for the ball to travel 30m during kick 3?
.5 seconds
2.0 seconds
1.0 seconds
1.5 seconds
6
Two forces are applied to a 17 kg box. It has a smooth surface. Which is true?
The box does not accelerate.
The box accelerates to the right at 1.9 m/s/s
The box accelerates 3.0 m/s/s
The box accelerates at 1.0 m/s/s to the right.
7
Archer shot a .06kg arrow. It accelerated at 5000 m/s/s to reach a speed of 50 m/s. Force?
30N
900N
300N
3000N
8
A meteor moving 468 km per minute It was only 45 m wide and was 27,700 km above Earth's surface
Its velocity was 7.8 km/s northward.
Its speed was 468 km/s northward
Its acceleration was 468 km/s/s
Its acceleration was 7.8 km/s/s
9
The mass ball is 0.05 kg.It accelerates at 2,000 m/s/s. What is the net force?
2500N
250N
1000N
100N
10
A student graphed the position of a cart during a 7 second time interval. Which is true?
The cart moved at a constant velocity for the entire time.
The cart accelerated.
The cart was stationary with a velocity of 0.
The cart was stationary except for a short burst of energy.
11
During which procedures did students observe an unbalanced upward force?
Procedures 4 and 5.
Procedures 3 and 4.
Procedures 1, 3, and 5.
Procedures 1, 2, and 3.
12
Ana applies a force of 10N to a board.Force of friction is 4N. What is the net force?
6N
14N
10N
4N
13
If the load exerts a strong downward force, the glue...
exerts an upward force that is = to the downward force.
causes the load to accelerate upward.
destroys the force.
exerts a stronger downward force.

8th Grade Science Physics Newton's Laws force and motion Flashcards | StudBud