Need Help with physics!?

Question

An object is dropped from a height of 50m, on a certain planet it took 5 seconds to reach the ground. What is the weight of the object on the planet if its weight on earth is 35N?

Answer 1

Mass = weight / acceleration due to gravity.

Its weight on earth is 35N, and acceleration due to gravity on earth is 9.8m/s2 ... so its mass is 35 / 9.8 = 3.57Kg

On the other planet its weight = mass x acceleration due to gravity for that planet.

we know its mass is 3.57Kg so we need to find the planets gravitational pull to multiply it by.

we know an object falls 50m in 5 secs

so using S= 1/2 a t^2

50 = 1/2 x a x 25
100 = 25a
a= 4 m/s2


So to find the weight on the other planet F=ma = 3.57 x 4 = 14.3N

Answer 2

The weight of a body on any planet is W= Ma, where M is it's mass, and a is acceleration of gravity on the planet.

In case a body is dropped, it falls with this acceleration, and if it is dropped, then it's velocity is zero at the beginning of it's falling time T.

Then the body will pass distance S=aT^2/2 while falling.
Hence we can find its acceleration: a=2S/T^2,
So, on the planet a=2*50/25=4(m/s^2).

If the body has it's weight 35N on Eath, where a=g=9.81(m/s^2), so it's mass is M=W(Earth)/g=35(N)/9.81(m/s^2)=3.57(kg).

And finally, knowing it's mass and the planet's acceleration,

W=Ma=3.57(kg)*4(m/s^2)=13.27(N)
That is the result

Answer 3

35N the gravity there might be a change of gravity on a different planet but things still way the same .

Answer 4

14.28N
'g' on planet = 2S/t^2= 100/25=4N/kg
Mass on earth= m=W/g= 35/9.8=3.57kg
Weight on planet=W=m'g'= 3.57x4= 14.28N
That took 2.5min at 15pound/hour so you owe me 62.5 pence tutor's fees please! lol

Answer 5

14.3N