1) The grapefruit is in free fall, so it moves by uniformly accelerated motion, with constant acceleration
. Calling h its height at t=0, the height at time t is given by
We are told thatn when
the grapefruit hits the ground, so h(0.75 s)=0. If we substitute these data into the equation, we can find the initial height h of the grapefruit:
2) The speed of the grapefruit at time t is given by
where
is the initial speed of the grapefruit. Substituting t=0.75 s, we find the speed when the grapefruit hits the ground:
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Answer:
frequency = velocity divided by wavelength
Explanation:
Explanation:
Yes. For example, when you press the gas pedal in a car, you accelerate in the same direction that you are moving in. So the velocity and acceleration have the same sign.
The correct answer is: Angular velocity =
rad/s
Explanation:
The angular velocity is given as:
ω =
--- (1)
Where T = 165 * (365 days) * (24 hours/day) * (60 minutes/hour) * (60 seconds/minute) = 5203440000 s
Plug in the value in (1):
ω =
rad/s
