Answer:
Explanation:
a) the free body diagram of the lower pulley would have two force vectors of equal magnitude acting upward and the block weight acting downward. These must balance so 2F = Wt
F = 262/2 = 131 N
b) as the force needed is half of the block weight, the mechanical advantage is 262 / 131 = 2
c) with a mechanical advantage of 2, he would have to pull twice the distance of block motion or 2(3.00) = 6.00 m
d) W = Fd = 131 N(6.00 m) = 786 J
which is the same as the increase in potential energy of the block
e) W = mgh = 262(3.00) = 786 J
Answer:Balance Forces
Explanation:
Balanced Forces are equal in magnitude and opposite in direction that acts on the same body. Whenever balanced forces act on an object the object is either still or moving in the same direction with constant velocity.
example of Balanced Forces are
- Consider a block lying on the ground and is being pulled by two forces of equal magnitude but in acting in the opposite direction. As a result, the block is at rest.
Answer:
1. it spins
2. falls in a curve
3. falls flat on the floor
Answer:
longer
Explanation:
The relationship between the solar day and sidereal is as follows:
The length of the sidereal day is
= (Solar day) (solar year ÷ solar year + 1 day)
As it can be seen that the day i.e. solar its length would be greater as compared with the sidereal day.
In the case when the earn orbited the sun in 9 months rather than 12 so here the sidereal day would be the similar but the solar day would be longer as compared with the original one