Mechanics | Relativity Answers

A body is thrown with speed 20m/s vertically upward. It will return to thrower's hand after a time?(g=10m/s square)

during shooting of a super hit film ,mard amitabh was waiting for his beloved amrita with
his dog.when he saw her approaching,dog was
exited and dashed to her,then back to his master
and so on,never stopping.how far would you estimate the dog ran if its speed is 30km/hr and each of them walked at 4km/hr;starting
400 m apart?

College softball distance from the pitcher's mound to the batter is 43 feet. If the ball leaves the bat at 85 mph, how much time elapses between the hit and the ball reaching the pitcher?

Determine magnitude of the gravitational force that you exert on another person 2.40 m away. Assume you and the other person each have a mass of 63.0 kg.

state the relation between mass and inertia.

A crate of eggs is located in the middle of the flat bed of a pickup truck as the truck negotiates an unbanked curve in the road. The curve may be regarded as an arc of a circle of radius 34.5 m. If the coefficient of static friction between crate and truck is 0.570, how fast can the truck be moving without the crate sliding?

what is velocity

The natural frequency of a string under constant tension varies inversely as its length. If a string 40 cm long vibrates 680 times per second, what length must the string be to vibrate 850 times per second under the same tension?

A unit mass attached to a spring (with spring constant 10N/m) experiences a displacement of 10cm when placed inside a moving rocket. Calculate the acceleration of the rocket as sensed by the unit mass

A body of mass 6kg travelling with a velocity 10 m/s collides head on and elastically with a body of mass 4kg travelling at a speed 5 m/s in opposite direction. The velocity of the second body after the collision is.