Car Crash Physics

When I accelerate an object, what quantity does "work" turn into?

• the energy of motion (Kinetic Energy)

• Momentum

• Speed

• Velocity

How is "impulse" related to "momentum?"

• Force x time = mass x Δ velocity

• An impulse causes a change in an object's momentum

• Force x time = Δmomentum

What does an "impulse" cause?

• A change in an object's direction

• A change in the mass of an object

• A change in an object's momentum

What is momentum?

• A vector

• mass x velocity

• "the amount of movement"

• A way of finding the velocities before and after a collision

How do we calculate "impulse?"

• Average force x time

• Mass x Δ velocity

• 1/2 mass x velocity²

When I apply the brakes in my car, does my acceleration change?

• Yes, the acceleration becomes negative, meaning that it's opposite to the direction the car is moving

• No, there is no change in acceleration.

• Yes, the acceleration increases in the same direction as I'm moving

Which vehicle would sustain more damage: a compact car hitting a brick home at 20 mph, or a large dump-truck hitting the same brick home at 20mph?

• Both vehicles would sustain the same amount of damage

• The dump-truck would have more damage because it has more mass

• The compact car would have more damage because it has less mass

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which vehicle would cause more damage to a brick home: a 1,500 pound compact car traveling at 50 mph or a 15,000 pound dump-truck traveling at 10 mph?

• The compact car because it's traveling faster

• The dump-truck, because it has more mass than the car

• There isn't enough information provided to determine the answer

Momentum = mass x ( ?? )

• Kinetic energy

• Time

• Acceleration

• Velocity