T 3.)A car traveling at 21 m/s misses the turnoff
on the road and collides into the safety
guard rail. The car comes to a complete
stop in 0.55 s.
a. What is the average acceleration of the
car?
b. If the safety rail consisted of a section
of rigid rail, the car would stop in
0.15 s. What would be the acceleration
in this case?

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

If the textbook weighs 19.6 newtons on venus, what is the strength of gravity on venus?

Which of the following types of electromagnetic radiation has the longest wavelength? a. infrared light b. visible light c. ultraviolet light d. microwaves