Recent content by ahsanmhamid

how high does a rocket have to go above the Earth's surface until its weight is 0.4 times its weight on the Earth's surface ? The radius of the Earth is 6.37 * 10 ^ 6m and the acceleration of gravity is 9.8 m/s^2. Answer in units of km. what i got so far, i need help proceeding: Applying...

what does the variable R represent?

i need some help setting up the problem.

i need some major help i know the formula for a= vf-vi/t

i need some help setting up the problem. I don't unders the horizontal and vertical componenets. Also what formula do i use?

a quaterback throws a football towards a reciever with an initial speed of 22m/s, at an angle of 34 degrees above the horizontal. At that instant, the reciever is 21 m from the quarterback. The acceleration of gravity is 9.8 m/s ^2. WIth what constant speed should the reciever run in order to...

The French National Railroad holds the world's speed record for passenger trains in regular service. A TGV (tres grand vitesse, or very great speed) train traveling at a speed of 325 km/h requires 1.35 km to come to an emergency stop. Find the braking acceleration for this train, assuming...

A football is thrown upward at a(n) 43 degree angle to the horizontal. The acceleration of gravity is 9.8 ms^2 : To throw a(n) 77.8 m pass, what must be the initial speed of the ball? Answer in units of ms.

A projectile of mass 0.552 kg is shot from a cannon, at height 7 m, with an initial velocity vi having a horizontal component of 5 ms. The projectile rises to a maximum height of Y above the end of the cannon's barrel and strikes the ground a horizontal distance X past the end of the...