The equations of motion are given above. Try these problems. Solutions will be coming over the weekend. Thanks!
1. (From last homework.) How far will a freely-falling body fall in 4 seconds? There is no air resistance.
2. A car starts from rest and achieves a speed of 30 m/s in 4 seconds. Find:
a. the acceleration
b. the distance that it goes in the 4 seconds
Now the same car applies the brakes once it has achieved 30 m/s. If the car stops in 2 seconds, find:
a. the acceleration
b. how far the car travels in the 2 seconds
3. Consider throwing a ball up in the air with an initial speed of 30 m/s. I suggest that you call up positive (which makes gravity negative).
a. How long will it take for the ball to reach apogee (the top)?
b. How high will it go?
b. How high will it go?
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