Other Physics Answers

An object of mass 6kg falls from a height of 90m above the ground. Calculate its total energy falling through 40m.

What is the momentum of a vehicle if a force of 1000 N is applied on it in 0.50 seconds if it started from rest?

How long will it take to put a 4500 kg truck to rest from a velocity of 20.0 m/s if the force applied by the brakes is 5000N?

How much force is needed to put a 3000 kg vehicle to rest if initially moving at 16.67 m/s and if this force is to be applied on the vehicle for 30.0 seconds?

A 50 N force is used to push a 0.65 kg metal ball from rest. If the force is applied on the ball for 0.25 seconds, what will be its final velocity?

A 0.30 kg metal ball at a velocity of 3.0 m/s hits another metal ball with a mass of 0.20 kg which is at rest. What is the velocity of the 0.20-kg metal ball if the velocity of the 0.30-kg metal ball became 2.0 m/s after the collision? Use: p before the collision (m₁v₁ + m₂v₂) = p after the collision (m₁’v₁’ + m₂’v₂’)

The bob of a simple pendulum takes 0.25seconds to swing from it equilibrium position to one extreme end. Calculate its period?

A sled is pulled from rest by a net force of 2.8 N [forward]. The sled moves 7.4 m, reaching a velocity of 3.9 m/s [forward]. Determine the mass of the sled. (determine the mass by using one of the kinematic equations).

Calculate the increase in length when 1000.0cm of steel wire of linear expansitivity 1.2×10-5°c is heated from 0°c to 50°c

In a magnetic field of 8x10^-4 T oriented south, a 3.21x10^-6 C flows east at a velocity of

4x10^6 m/s. How strong is the magnetic force operating on the charge?