1, If pressure is force per unit area, show that a 60-kg man with a 3-cm heel size exerts approximately 20 times more pressure on the floor than a 600-kg elephant with a 1-ft heel size. 2, A car sits on an entrance ramp to a freeway, waiting for a break in the traffic. Then the driver accelerates with constant acceleration along the ramp and onto the freeway. The car starts from rest, moves in a straight line, and has a speed of 18 m/s (145 mi/h) when it reaches the end of the 117-m-long ramp. (a) What is the acceleration of the car? (b) How much time does it take the car to travel the length of the ramp? (c) The traffic on the freeway is moving at a constant speed of 18 m/s. What distance does the traffic travel while the car is moving the length of the ramp?
1, If pressure is force per unit area, show that a 60-kg man
with a 3-cm heel size exerts approximately 20 times more pressure
on the floor than a 600-kg elephant with a 1-ft heel size.
2, A car sits on an entrance ramp to a freeway, waiting for a break in the traffic. Then the driver accelerates with constant acceleration along the ramp and onto the freeway. The car starts from rest, moves in a straight line, and has a speed of 18 m/s (145 mi/h) when it reaches the end of the 117-m-long ramp. (a) What is the acceleration of the car? (b) How much
time does it take the car to travel the length of the ramp? (c) The
traffic on the freeway is moving at a constant speed of 18 m/s.
What distance does the traffic travel while the car is moving the
length of the ramp?
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