Hey guys, I didnt understand why statement 3 is wrong. Isn’t the acceleration equal to the gravity (a=g). Am I wrong?

Hi!

1). GPE=m x g x h=100 x 10 x 2(from d=v x t)= 2000J so, it’s correct.

2). The tension in the cable equals weight of the mass which equals mg= 100 x 10=1000N so, it’s not correct.

3). we are told that the mass moves at a constant speed hence, we have no acceleration.

Thus answer is A.

Hope it helps:)

2 Likes

ohh yes, thanks so much!

1 Like