Help please I do not understand
1 answer:
You might be interested in
<h2>Her weight at the height of R will be 100 N</h2>
Explanation:
The weight of the body on the surface of earth can be found by the relation
W₁ = I
Here G is gravitational constant and M is the mass of earth .
m is the mass of the body
and R is the radius of earth or the distance of body from the center of the earth .
Now she moves to height equal to R . Thus the distance from center of earth becomes 2 R .
Thus Weight now is W₂ = II
Dividing II by I , we have
=
But W₁ = 400 N
Thus W₂ = = 100 N
Answer:
3.32 m/s
Explanation:
From the law of conservation of energy, the sum of mechanical and kinetic energy should be equal to the 10 J given. Potential energy is given by mgh where m is mass, g is acceleration due to gravity and h is the height. For this case, and l is string length, given as 2 m, \theta is given as 50 degrees. Kinetic energy is given by
and it is this velocity that is unknown.