Mechanics | Relativity Answers

A projectile is launched horizontally with the velocity of 30 milliseconds after 3 milliseconds at the magnitude of the vertical component of velocity is approximately
what milliseconds at the magnitude of the vertical component of velocity is approximately what a second

an arrow is shot from a bow at a 30 degree angle and a velocity of 50 m/s.
A) what is the horizontal range of the arrow?
B) what is the maximum height of the arrow?

a cannon is fired horizontally from the top of a castle and lands 250 meters down range. if the cannon ball leaves the cannon at 400 m/s how high is the castle?

a 2 kg mass is moving with a speed of 3 m/s. What is the kinetic energy of the mass?

A horse pushes a cart.If the action and reaction are equal and opposite then how does the cart move??

Acceleration can be zero even when several forces are acting on it.Do you agree?Why?

A 2kg iron block is taken from a furnace where its temperature was 650 C and placed on a large block of ice at 0C. assuming that all the heat given up by the iron is used to melt the ice, how much ice is melted?

the motors of an electric train can give it an acceleration of 1 m/s2 and the brakes can give a negative acceleration of 3m/s2. find the shortest time interval in which the train can make a journey between two stations 1210m apart .

a bullet after entering a wooden block at rest covers 30 cm inside it and loses half of its velocity after how much further distance will it come to rest?

A 12 kg red ball travels with a velocity of 7 m/s towards a 8 kg blue ball that is traveling a a speed of 10 m/s in the opposite direction.What is the velocity of the blue ball after collision if the velocity of the red ball after collision is 5 m/s?(The balls have changed direction.)