Motion and Forces

a force that opposes the motion of an object in contact with a surface

• motion
• force
• friction

a physical law stating that an object tends to stay at rest and an object moving in a straight line at a constant speed tends to continue moving that way

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

A push or pull on an object is called _______________________________.

• force
• motion
• position

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A change in an objects position is called ____________________________.

• motion
• speed
• friction

When net forces are equal in strength and opposite in direction, they are said to be _____________________________.

• balanced
• unbalanced
• equal

What is the unit of measurement for force?

• m/s
• N, newtons
• cm

What number represents balanced forces?

• 0, zero
• 7, seven

• 14, fourteen

*

• F The speed of the cart decreases as the cart rolls down the ramp because of friction between the cart and the ramp.
• The speed of the cart increases as the cart rolls down the ramp because the force acting on the cart is greater than the force of gravity
• The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.
• The speed of the cart decreases as the cart rolls down the ramp because the forces acting on the cart are balanced.

The tendency to resist a change in motion is called

• motion
• force
• net force
• inertia

What is the most common frame of reference?

• The Sun
• Earth
• Your house
• Mrs. Hoover's desk