Answer:
5.3 kg
Explanation:
The rope attached to the ceiling has a tension 64 N.
The rope attached to the wall has a tension T.
The rope attached to the block has a tension Mg.
Sum of the forces at the junction in the y direction:
64 sin 55° − Mg = 0
Mg = 64 sin 55°
M = 64 sin 55° / g
M = 64 sin 55° / 9.8
M = 5.3
The mass of the block is 5.3 kg.
A rader gun will determine the speed.
Answer:
to be honest I'm not sure
Sitting = no movement
KE=0
Should be 28 meters per second.
140m ÷ 5s