Find the net force it would take to accelerate an 800 Kg car at a rate of 5 m/s2

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?

Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.