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Calculate the flight time of a ball moving in parabolic motion, with initial velocity 5.0m/s at angle 30 degrees from the horizontal travelling for 23 metres.

First, you would resolve the initial velocity into horizontal and vertical velocity. Then, using the correct suvat equation, s=ut, you can calculate for t. In this case, t=4.0s to 2 significan figures.
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Answered by Aabhas S. • Physics tutor
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what force does a person have to exert on one side of a seesaw if the other person weighs 70kg and is the same distance away from the pivot (2m) on the other side of the seesaw?

70kg x 9.8 = 686N x 2 = 1372 Nm, as 2m away again, divide by 2 = 868 Newtons
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Answered by Marcus B. • Physics tutor
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Why does a change in depth in water give a far greater difference in pressure than the same change in height in air?

Begin by explain that pressure is described by the amount of force exerted on a given area (N/m 2 ). The force in this equation is given by the weight of everything directly above the point you are measuring...
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Answered by Murdo B. • Physics tutor
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What is the difference between a scalar and a vector?

In physics, a scalar is a quantity of a one value to describe the size of a physical property , such as energy or distance . A vector is a quantity of two values that describe the direction in which a physic...
CB
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I throw a ball straight up with an initial velocity of 2m/s. How high is it after a fifth of a second?

assign each variable to a value in s = ut + 1/2at 2 u = 2m/s t=0.2sa=-9.81m/s 2 so s = (2 x 0.2) + 1/2(-9.81)(0.2) 2 so s =
HA
Answered by Henry A. • Physics tutor
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