if: v = final velocity, u = initial velocity, a = acceleration, s = distance
then: v2 = u2 + 2as
This is just one of the different formulae you could choose to use, but the advantage of this one is that you don't have to calculate time taken before the calculation can be done. The mass of the box (20kg) is not needed, as all objects will accelerate at the same rate unless wind resistance is significant. Unless the box has a parachute or very large surface area, this shouldn't be a complication.
u = 0
a = 9.8 ms-2 (acceleration due to gravity)
s = 4 m
v2 = 02 + 2*(9.8 ms-2)*(4 m)
v2 = 78.4 (ms-1)2
v = sqrt(78.4) ms-1
v = 8.9 ms-1
a ball rolled across a horizontal table moved at cont ant velocity why?
If a ball is thrown horizontally from a window on the second floor of a building, the vertical component of its initial velocity is zero.
The potential energy is 147 joules.
100
The same amount of potential energy again.
It means he actually falls to the ground or floor.
reach down and retrieve it
Peppa falls on the floor when she is laughing, it is known in text language as ROFL roll on floor laughing.
Its given a second reading
obsidian. It is a very dark substance.
When something falls on the floor you are like how did that happen and you didn't mean to do it.
A truck moving at constant velocity inside the storage compartment a rock is dropped from the midpoint of the ceiling and strikes the floor below the rock hits the floor Read more:
If you simply release an object, the initial velocity is always zero.
a ball rolled across a horizontal table moved at cont ant velocity why?
Wouldn't it depend on how far it falls? Off the couch onto the floor? Almost certainly not. Off of a 25th floor balcony onto the street below? Probably.
If a ball is thrown horizontally from a window on the second floor of a building, the vertical component of its initial velocity is zero.
100