7th Grade Physics Review

The equation for speed....

• time over distance

• distance X time

• distance over time

• V1 - V2/T

Tags

NGSS.MS-PS3-1

The rate at which an object moves from one place to another (no direction)

(a)  

Which law of motion explains why a rocket is propelled upwards when gas is expelled out of its engines?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Centripetal Force

When a car comes to a stop, why do the passengers lurch forward?

• Newton's First Law
• Newton's Second Law
• Newton's Third Law
• Centripetal Force

Which is the formula for Newton's 2nd Law?

• F = m + a
• F = m x a
• F = a/m
• F = m/a

Tags

NGSS.MS-PS2-2

If a kid pushes a wagon, a wagon weighing 20 kg will accelerate ___ as fast as a wagon with 10 kg.

• 1/2 as fast
• 2 times
• 10 times
• The wagons will show the same acceleration

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

If you are standing on a skateboard and push against a wall, why do you move backward?

• Newton's First Law
• Newton's Second Law
• Newton's Third Law
• Centripetal Force

Tags

NGSS.MS-PS2-1

"An object at rest will stay at rest, and an object in motion will stay in motion with the same speed and same direction unless acted on by an unbalanced force."

• Newton's First Law
• Newton's Second Law
• Newton's Third Law
• Centripetal Force

The normal force pushing up from the floor is 50 N and the gravitational force pulling down is 50 N. The frictional force to the left is 20 N and the pushing force to the right is 85. Is the net force on the box?

• 100 Newtons
• 205 Newtons
• 105 to the right
• 65 to the right

Tags

NGSS.MS-PS2-2

A person is swinging a yoyo around on the International Space Station. What type of force keeps an object moving in a circular path and pulls it towards the center? Note: Spelling counts, use all lowercase letters and it is one word. Use your SSN!

(a)