Question

PLEASE ANSWER ALL 3 QUESTIONS ALL DIFFERENT PROBLEMS!!!

1. In April 1974, Steve Prefontaine completed a 10 km10 km race in a time of 27 min27 min, 43.6 s43.6 s. Suppose "Pre" was at the 8.27 km8.27 km mark at a time of 25.0 min25.0 min. If he accelerated for 60 s60 s and then maintained his increased speed for the remainder of the race, calculate his acceleration over the 60 s60 s interval. Assume his instantaneous speed at the 8.27 km8.27 km mark was the same as his overall average speed up to that time.

2. A small object begins a free-fall from a height of ?=83.5 mH=83.5 m at ?0=0 st0=0 s. After τ=2.40 sτ=2.40 s, a second small object is launched vertically up from the ground with an initial velocity of ?0=40.5 m/sv0=40.5 m/s. At what height from the ground will the two objects first meet? Height = ??

3. A sperm whale can accelerate at about 0.0800 m/s20.0800 m/s2 when swimming on the surface of the ocean. How far will a sperm whale travel if it starts at a speed of 1.10 m/s1.10 m/s and accelerates to a speed of 2.18 m/s2.18 m/s? Assume the whale travels in a straight line. What is the distance traveled?

Answer 1