Physics Help Please?

Question

(1) A 3.00 kg ball is dropped from rest from the roof of a building 176.4 m high. While the ball is falling, a horizontal wind exerts a constant force of 12.0 N on the ball. How long until the ball hits the ground? Possible Answers:

a) 7.00 s

b) 6.00 s

c) 5.00 s

 

(2) The numbers of significant figures in 6.30 g and 8.030 * 10^3 m are:

a) 2 and 2

b) 3 and 4

c) 2 and 3

d) 4 and 5

 

(3) A golfer takes two putts to sink a ball in the hole. The first putt displaces the ball 6.00 m east, and the second putt displaces the ball 5.4 m south. What displacement would put the ball in the hole in one putt?

a) 8.07 m at 48 degrees SE

b) 11.4 m southeast

c) 3.32 m at 42 degrees SE

d) 8.07 m at 42 degrees SE

Answer 1

I will tell you the answers. You try to figure out why those are the answers.

1. b

2. b

3. a