The force advantage of the direction changing pulley shown is 1. The correct option is b.
<h3>What is force advantage?</h3>
Force is the mechanical physical quantity. The force advantage is equivalent to the mechanical advantage equal to the ratio of output to the input force.
In the single fixed pulley, there is only one rope segment that pulls up on the load, so,
The force advantage is
F.A = 50 N / 50 N = 1
Thus, the force advantage of the direction changing pulley shown is 1. The correct option is b.
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1) B- adhesion
3) c- they increase friction
Answer: 30s, 900m
Explanation: once the break is applied, the car will decelerate and the car will come to rest.
Since the car is coming to rest, final velocity (v) equals zero.
Hence u = 60 m/s, a = - 2m/s²
Recall that v = u + at
0 = 60 +( - 2)t
2t = 60, t = 60 /2 = 30s.
To get the distance covered before the car comes to rest, we have the formulae below
v² = u² + 2as
0² = 60² + 2(-2)s
0 = 3600 - 4s
4s = 3600
s = 3600/ 4 = 900m
5,758.5 miles or thr moon is a quarter of the diameter of the earth