Momentum / air resistance

Which two of these forces act on parachutes?

• Air Resistance

• Gravity

• Thrust

• Kinetic Energy

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What causes an object to fall faster?

• Smaller surface area

• Larger surface area

• If it has a parachute

• If it is softer

Tags

NGSS.MS-PS2-2

The larger the surface area of the moving object, the ___________ air resistance there is.

• Less

• More

• Longer

• Quicker

Tags

NGSS.MS-PS2-2

Air resistance pushes against falling

objects and __________________.

• Speeds them up

• Keeps them afloat

• Slows them down

• Spins them

Tags

NGSS.MS-PS2-2

An object in motion with no forces acting on it will continue to move with constant:

• momentum
• acceleration
• impulse
• none of these

A heavy truck and a light truck roll down a hill. Ignoring friction, at the bottom of the hill, the heavier truck will have:

• greater momentum
• greater speed
• less speed
• less momentum

A 5 kg cart moving at 1 m/s collides with a 15 kg brick. It keeps rolling with the brick attached to the cart. The cart and brick together now have a momentum of:

• 0 kg⋅m/S
• 5 kg⋅m/S
• 20 kg⋅m/S
• more than 5 kg⋅m/S

A 5 kg ball has a momentum of 15 kg⋅m/S. What is the ball's velocity?

• .333 kg⋅m/S
• 3 kg⋅m/S
• 75 kg⋅m/S
• 10 kg⋅m/S

A ball with a momentum of 20 kg⋅m/S is moving at 5 m/S. What is its mass?

• 4 kg
• .25 kg
• 25 kg
• 100 kg

Two soccer balls of equal mass roll toward each other at the same velocity. What is the total momentum of the two balls?

• 0 kg⋅m/S
• 10 kg⋅m/S
• more info is needed