Sam heaves a 16-lb shot straight up, giving it a constant upward acceleration from rest of 35.0 m/s2 for 64.0 cm. he releases it 2.20 m above the ground. ignore air resistance. (a) what is the speed of the shot when sam releases it? (b) how high above the ground does it go? (c) how much time does he have to get out of its way before it returns to the height of the top of his head, 1.83 m above the ground?

a. 6.69m/s

b. y=4.48m

c. t=1.43secs

Explanation:

Data given, acceleration,a=35m/s^2

distance covered,d=64cm=0.64m,

a. to determine the speed, we use the equation of motion

initial velocity,u=0m/s

if we substitute values we arrive at

b. After taking the shot,the acceleration value is due to gravity i.e a=9.81m/s^2

and the distance becomes (y-2.2) above the ground. When it reaches the maximum height, the final velocity becomes zero and the initial velocity becomes 6.69m/s.

Hence we can write the equation above again

if we substitute values we have

c. the time it takes to arrive at 1.83m is obtain by using the equation below

if we insert the values, we solve for t , hence t=1.43secs

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

scientific laws are the result of testing theories and proving them to be facts.