Answer:
5.5 kg
Explanation:
The gravitational potential energy of an object is given by
where
m is its mass
g is the acceleration of gravity
h is the height of the object above the ground
For the rock in the problem, we know:
h = 12 m is the height above the ground
U = 650 J
g = 9.8 m/s^2
Therefore, we can solve the equation for m, the mass of the rock:
It is b exothermic cause it in a system increases the reaction is considered to be b.
Answer:
South west or SW
Explanation:
it's in between south and west
Answer:
25 m
9.9 m/s
22 m/s
Explanation:
m = Mass of ball
v = Velocity
g = Acceleration due to gravity = 9.81 m/s²
Applying conservation of energy
The height above the ground is 5.09683+20 = 25.09683 m = 25 m
The ball's speed as it passes the window on its way down is 9.9 m/s
The speed of impact on the ground is 22 m/s
