Recent content by sr57

Using relativistic approach: T = To/square root of (1-v^2/c^2) T = 10 light years x speed of light/ V --> I'm not sure abt this To = 1 year = 3.15 z 10^7 seconds I don't know how to find V when i substitute the numbers

1/2 (0.25 kg)(0.02 m/s) = 1/2 (25 N/m)(x^2) x^2 = 0.002 m I put the answer for the rong question before..sorry abt that :$

So 1/2 mv^2 = 1/2 kx^2 x = 0.01 m

Homework Statement A spacecraft with its astronaut has a total mass at rest of 10^5 kg. The astronaut is to travel to a star 10 light years away at a speed such that she only ages 1 year in her frame of reference a) the quantity 1-v/c where v is her speed with respect to Earth is? b)...

Sorry I meant P = Fv therefore F = P/V and since P=mv, F = mv/v = m ?

Thank you I got it. I made a mistake with the calculations b4..but this is the way right? Since F= PV => F = (mv)v ==> F= 0.25 F= kx 0.25/25 N/m = x x= 0.01 m

A 0.2 kg block of wood is attached to a spring with a spring constant k = 25 N/m. The block is initially at rest and the spring is at its equilibrium length aligned along the x-axis. A dart of mass 0.05 kg is thrown at a block of wood, undergoes an inelastic collision and sticks into the...