Mechanics | Relativity Answers

A driver does a round trip to ibadan from lagos,returning to his take-off point in five hours. The distance of ibadan from lagos is 130km.What is his average velocity?

What is the dimension of power?

the joule (J) is the same as?

A stationary observer at a railway station sees a passenger in a railway coach that is in motion at constant speed in a straight and horizontal track. Which of the following best descibes the frames of reference from which both the observer and the passenger descibe each other's motion?

The power (in watts) from an engine is given by the equation P=〖80t〗^1.3+5t where t is the time in seconds.

Draw a graph of power against time for the engine. From the graph approximate the energy produced between 3 and 7 seconds.
Using an appropriate method of integration to calculate the energy produced, and compare the answer with your approximation.

Car A of mass 1000 kg moving at 20m/s collides with a car B of mass 1200 kg moving at 10m/s in same direction. If the car B is shunted towards at 15m/s by the impact, what is the velocity, v, of the car A immediately after the crash ?

a satellite is moving in an orbit in equitorial plane at height of 1400km above earth surface.if it is travelling in the same direction as the directionof rotation of the earth what is the time interval between two succesive times at which it will appear vertically overhead to an observer standing on the equator?

a 1250 kg car increases its speed from 15.0m/s to 20.0m/s . how much work was done on the car?

Water is retained in a 1 m wide rectangular section channel by a sluice gate that can pivot about its base, as shown to the right.

Determine the tension in the horizontal retaining cable attached to the top of the gate when the depth of water in the channel is 1.5 m. The density of water is 1000 kgm−3.

Water is retained in a 1 m wide rectangular section channel by a sluice gate that can pivot about its base, as shown to the right.

Determine the tension in the horizontal retaining cable attached to the top of the gate when the depth of water in the channel is 1.5 m. The density of water is 1000 kgm−3.