Top answers

Physics
GCSE

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

MB
Answered by Marcus B. Physics tutor
1737 Views

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/m2). The force in this equation is given by the weight of everything directly above the point you a...

MB
Answered by Murdo B. Physics tutor
3062 Views

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 dis...

CB
2006 Views

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 + 1/2at2u = 2m/s t=0.2sa=-9.81m/s2so s = (2 x 0.2) + 1/2(-9.81)(0.2)2so s =

HA
Answered by Henry A. Physics tutor
2246 Views

If a car sets off from rest with a constant acceleration of 3 m/(s^2), what would its speed be after 5 seconds?

Firstly we write down all known variables: Initial speed (u)=0 m/s, Acceleration (a)=3 m/s2, Time (t)=5s. Final velocity (v)=?Therefore, the equation chosen to solve the problem would be: v=u+a...

SM
Answered by Shahnaan M. Physics tutor
1924 Views

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