I would say it’s “B” for the reason that the student did not experiment with a short ramp and large ball as well as a large ramp and a short ball. They have to do those experiments as well before drawing their conclusion.
The time of flight depends only on the initial velocity and the initial height
Explanation:
An object is said to be in free fall if the only force acting on it is the force of gravity. If this is the case, then the motion of the object in free fall is a uniformly accelerated object, with constant acceleration towards the ground. The time of flight can be found by using the suvat equation:
where
s is the displacement (which corresponds to the initial height of the object)
u is the initial vertical velocity
is the acceleration
t is the time of flight
Therefore, from the equation, we see that the time of flight depends only on two factors:
- s, the initial height of the object
- u, its initial velocity
In case the air resistance is not negligible, then the acceleration is no longer constant, and the time of the fall also depends on other factors such as the mass of the object and its shape, which affects the magnitude of the air resistance acting on the body.
Learn more about free fall:
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Answer:
False
Explanation:
A basketball sitting on a horizontal surface will experience static friction which prevents it from moving. Static friction is higher than when the ball and surface are in motion relative to each other. Objects that are resting on horizontal surface experience static friction which gives way to kinetic friction where the two objects, the surface and the object at rest, move relative to each other. The statement in the question is incorrect.
the answer is 1a as rearrange gives I = v divided by r