Please give exact answers not decimals! Part a two things are required, rate (ex
ID: 2830153 • Letter: P
Question
Please give exact answers not decimals! Part a two things are required, rate (exact number) and units.
An object shot vertically upward from the ground with an initial velocity of 160 ft/sec. At what rate is the velocity decreasing? Give units. Explain why the graph of velocity of the object against time (with upward positive) is a line. The graph of velocity is a line because the acceleration is decreasing at a constant rate. The graph of velocity is a line because the velocity is constant. The graph of velocity is a line because the velocity is decreasing at a constant rate. The graph of velocity is a line because the acceleration is increasing at a constant rate. The graph of velocity is a line because the velocity is increasing at a constant rate. Using the starting velocity and your answer to part (b), find the time at which the object reaches the highest po . sec Use your answer to part (c) to decide when the object hits the ground. sec Graph the velocity against time. Mark on the graph when the object reaches its highest po and when it lands. Find the maximum height reached by the object by considering an area on a graph. ftExplanation / Answer
a)32 feet per second squared
b)The graph of velocity is a line because velocity is decreasing at a constant rate
c)t=u/g=160/32=5 seconds
d)T=2*t=10 seconds
e) B
f)height=u^2/(2*g)=16*160/(2*32)=400 ft(Area enclosed line and x axis)