Answer:
Since the weight of the ant is not given, we cannot determined the work done.
Explanation:
Given parameters:
Distance covered = 150m
Unknown:
Work done by mouse = ?
Solution:
To solve this problem, we need to understand that work done is the force applied to move a body through a certain distance.
In this case, work done;
Work done = force x distance
Work done = Weight x distance
Since the weight of the ant is not given, we cannot determined the work done.
Answer:
The speed of the rock when it is at height h/4 is 
.
Explanation:
At maximum height the final velocity of the rock is equal to 0. Let u is the initial velocity of the rock. Using the conservation of energy to find it as :
.......(1)
We need to find the speed of the rock when it is at height h/4. Let v' is the speed. Using 3rd equation of motion as :
here a = -g and s = h/4
Using equation (1) :
So, the speed of the rock when it is at height h/4 is . Hence, this is the required solution.
Answer:
25lb
Explanation:
You haven't changed (you are made up of the same atoms), but the force exerted on you is different. Physicists like to say that your mass hasn't changed, only your weight.
Answer:
D
Explanation:
Gravity is the force of attraction between two objects.
Each object creates a gravitational field in wich every other object is affected by it.
