Answer:
Work done by the gardner is 500 J
Explanation:
As we know that the gardner apply force perpendicular upward by magnitude 300 N and along the floor horizontal force is 100 N
so we have
now the displacement of the gardner along the floor is
now work done is given as
so we have
Answer:
Explanation:
m = Mass of person = 70 kg
c = Specific heat of human body =
= Change in temperature
Time taken is 1 hour
Heat is given by
The rise in temperature is
<span>IM gonna go with B.)Similarities</span>
Answer:
In physical sciences, mechanical energy is the sum of potential energy and kinetic energy. It is the energy associated with the motion and position of an object.
Explanation:
Answer:
New gravitational force would be:
Explanation:
Recall the general form of the gravitational force between two objects of masses m1 and m2 separated a distance "d":
which for the 2000 kg trucks becomes:
when we add 1000 kg of bricks to one truck, we get the following unknown force (x) that we need to find:
Now we divide term by term the last equation by the previous one, in order to cancel out common factors to both equation (G, d^2) and get the following equation: