Answer:
1. 35 kg
2. 13875 kg
3. 945 kg. m^2/s
4.
Explanation:
1. p=mv
140=m(4)
140=4m
m=35 kg
2. p=mv
152625=m(11.1)
m=13875
3.K=1/2mv^2
K= 1/2 (2.1) (30)^2
K=945
