Recent content by Robdog

You already have his weight in the problem with 80kg

any idea?

Homework Statement Block 1, of mass m1 = 0.700kg , is connected over an ideal (massless and frictionless) pulley to block 2, of mass m2. Assume that the blocks accelerate downword with an acceleration of magnitude = 0.250m/s^2 and that the coefficient of kinetic friction between block 2...

Homework Statement A softball is hit over a third baseman's head with some speed (unknown) at an angle (unknown) above the horizontal. Immediately after the ball is hit, the third baseman turns around and begins to run at a constant velocity 7m/s . He catches the ball 2.0s later at the same...

o nvm should be the square root of 1.00s... ill try that, wow i feel like an idiot... i need to sleep

so... y=1/2at^2... y equal to the hight of 5m? if so then i get 5m=1/2(10m/s^2)T^2 which = square root of 5.00s which = 2.24s? but the that answer is still wrong. What did i do wrong.

the problem asks how much time is elapsed during the fall of the 5.0m at a rate of 10m/s^2 Im sure there is an equation for this but i don't know which one or where to find it...

Homework Statement Two ball are dropped from 5m high, Use 10 m/s^2 for the magnitude of the acceleration due to gravity. Homework Equations How do i start? The Attempt at a Solution not sure on how to start so i haven't attempted:(

My bad .49mm and 1.1m/s

Homework Statement When jumping, a flea reaches a takeoff speed of 1.1 over a distance of 0.49 . How long does the acceleration phase last? What is the flea's acceleration during the jump phase? If the flea jumps straight up, how high will it go? (Ignore air resistance for this...

Thanks!

Homework Statement A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 49.0 m/s . The acceleration period lasts for time 8.00s until the fuel is exhausted. After that, the rocket is in free fall. Homework Equations How do i...