Review Forces

An _______ force must act on an object for it to CHANGE it's motion

• balanced
• unbalanced
• gravitational
• electrical

This type of force resists motion between two surfaces that are pressed together

• mass

• gravity
• friction
• a push

Friction can be increased by

• making the surface rough

• making the surface smooth

• adding oil to the surface

• none of these

What is the net force in this picture?

• 50 Newtons to the right
• 950 Newtons to the right
• 950 Newtons to the left
• 50 Newtons to the left

What does the strength of gravity between two objects depend upon?

• Inertia & mass

• Mass & weight
• Gravity & inertia
• Mass & distance

What is the difference between mass and weight?

• mass is how much matter is in an object, and weight is the gravitational pull on that object
• mass and weight are the same
• weight affects how much mass is in an object
• weight is determined by how many atoms make up an object

As distance between two objects increase the pull of gravity 

• Increases
• Decreases
• Stays the same

Which of the following stays the same regardless of location?

• weight
• force
• mass
• Newtons

A person would weigh less on on the Moon than on the Earth because . . .

• Moon has more mass, and therefore more gravity
• Moon has less mass, and therefore more gravity
• Moon has more mass, and therefore less gravity
• Moon has less mass and therefore less gravity

A man weighs 850 Newtons on Earth. What is his mass?

m= F/g g=9.8 N/kg

• .011 N

• 8330 kg

• 86.7 kg

• 8330 N