Physics Answers

A uniform bar 15 meter long is balanced on a pivot placed at it's mid point. a boy boy of mass 55 kilograms sits on one or in the bar at a point 5 meters away from the pivot. What mass can be placed 2meter away from the other end of the bar to keep the bar horizontal

What is the strain energy stored in a body due to bending moment? *

20 m/s that makes an angle of 35° with the horizontal. What is the vertical velocity of the projectile after 3 seconds? Take the upward direction to be positive.

Samer's weight on earth is 588 N. Using the law of universal gravitation, what will be his weight on Mars?

Hi A car travels 200km the 2 highest speed of a car is 80 km/h the journey take two hours what is the average speed of the car?

1. A ball is thrown upward from the top of a 35-m tower, with an initial velocity of 80 m/s and an angle of 25 degree. a) Find the time to reach the ground and the distance R from the bottom of the tower to the point of impact in the figure below. b) Find the magnitude and direction of the velocity at the moment of impact.  

1. A particle of mass m =2kg starts from rest at the origin of an integral coordinate system at time t=0. A force F = 2 i + 4t j + 6t2 k is applied to it. Find the acceleration, velocity, and position of the particle for any latter time.

How much work can an electric coffee dispenser do if it uses 25W for 

5min?

What is the amount of power applied by the wind glass to a 20-kg 

anchor if it is lifted 2-m high with 5s?

A 400-N ship passenger climbs a 2-m high staircase. At the top, the total 

 amount of potential energy she has gained is