Which of the following is NOT an acceleration? O Riding your bike faster when you head down a hill
Slowing your bike so you can make it up a hill
O Coming to a stop at an intersection
Riding down the street at a constant velocity

coming to stop at intersecton

Explanation do u not  know what acceleration is?

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.

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle