Answer:
42.7m
Explanation:
Given:
h'= 1.8 m
r= 1.5 m
ω = 3 rev/s
ω = 3 ₓ 2 π rad/s =>6 π rad/s
Speed of the ball 'V' when it releases from the rope is given by,
V= ω x r
V= 6 π x 1.5
V=28.3 m/s
As we know that acceleration due to gravity always in downward direction.
The final speed will be zero
h = 40.8 m
So the height from the ground,H = h' + h
H= 40.8 + 1.8 =42.7m
Answer:
The coefficient of kinetic friction between the block and the surface is 0.127.
Explanation:
Given that,
The mass of a block, m = 4 kg
The acceleration of the block, a = -1.25 m/s²
We need to find the coefficient of kinetic friction between the block and the surface. The force of friction is given by :
So, the coefficient of kinetic friction between the block and the surface is 0.127.
It is equal to the force you exert on the chair.
Answer:
decrease the height
Explanation:
height is directly proportional to the g.p.e