One motionless car with more mass collides with another moving car with lesser mass (0:45 - 1:02) Why does the car with more mass have less acceleration after the collision? Explain using Newton’s Laws. (8 pts)
Answers
Answer:
Explanation:Running Time:
22 minutes
Directions:
To help you remember the key physics concepts discussed while viewing the video, fill in
the blanks or circle the correct answer.
Video Scenes & Key Concepts
Test Track Laws
Why did the dummy get left behind? It’s called inertia , the property of matter
that causes it to resist any change in its motion .
Isaac Newton’s circle one 1st 2nd 3rd Law of Motion states:A body at rest remains
at rest unless acted upon by an external force , and a body in motion
continues to move at a constant speed in a straight line unless it is acted upon by
an external force.
Crashing Dummies
Now watch what happens when the car crashes into a barrier.The front end of the car
is crushing and absorbing energy which slows down the rest of the car.
In this case, it is the steering wheel and windshield that applies the force that
overcomes the dummy's inertia .
Crash-Barrier Chalkboard
Newton explained the relationship between crash forces and inertia in his
circle one 1st 2nd 3rd Law of Motion.
(Fill in the blanks to explain what each letter in the formula represents.)
F = force F = ma m = mass
a = acceleration
F = m∆v ∆v = change in velocity
t t = time or rate
Ft = impulse Ft = m∆v m∆v = change in momentum
“Understanding Car Crash
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