Answer:
Explanation:
Given that,
The length of the pendulum, l = 2 m
The period of the pendulum, T = 2.2 s
The formula for the time period of a pendulum is given by :
or
So, the free fall acceleration is .
Answer:
50.0 m
Explanation:
First of all, we can find the initial velocity of the ball, using the equation
v = u + at
where
v = 0 is the velocity of the ball at the highest position
u is the initial velocity
is the acceleration of gravity
is the time the ball took to reach the maximum height (half of the time it remained in the air)
Solving for u,
Now we can find the maximum height using the other SUVAT equation:
where d is the maximum height. Solving for d,
Answer: 2.4 m/s
Explanation:use KE= 1/2 mv²
Derive to find v:
v = √ 2KE / m
= √ 2 ( 9 J ) / 3 kg
= 2.4 m/s
Friction is a force. A resistance force that tries to slow down and stop objects in motion. The difference between friction and air resistance is that friction acts on surfaces. For example, if I were skateboarding on a rough surface, more friction would occur so I would travel slower. If I were skareboarding on ice, I would go faster because there is much less friction to slow me down. Hope that helps:)