If a mango fruit dropped at a height of 50 meters. How long does it reach the ground? (take g = 10m/s²)

A zinc has a heat capacity of 40 J/K, what is the mass of the zinc, given that the specific heat of zinc is 380 J/kg k

If a ball released from a height of 20m, How long would it take the ball to reach the ground? (assures g = 10m/s)

If the velocity ratio of a machine is 5. What is its ratio of x and y?

If the mechanical advantage of a machine is 4. What is its ratio for LOAD to EFFORT?