College physics assignment pls my teacher sucks. mathphys this is for you im sorry i annoy you but at least u get points : ') < 3

1. 6.688

3. 73.755

Explanation:

008

First, find the acceleration.

Given:

v₀ = 0 m/s

v = 41.8 m/s

t = 20 s

Find: a

v = at + v₀

(41.8 m/s) = a (20 s) + (0 m/s)

a = 2.09 m/s²

Now find the force with Newton's second law:

∑F = ma

∑F = (3.2 kg) (2.09 m/s²)

∑F = 6.688 N

009

Apply Newton's second law:

∑F = ma

T − mg = ma

T = mg + ma

T = m (g + a)

T = (5.5 kg) (9.81 m/s² + 3.6 m/s²)

T = 73.755 N

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

the independent variable, or the one that is intentionally manipulated is the speed.