What is the formula for acceleration and work and power and force

To a stationary observer, a bus moves north with a speed of 10 m/s. A man inside walks toward the back of the bus with a speed of 0.4 m/s relative to the bus. What is the velocity of the man according to a stationary observer?

1. What is work done in holding a 15kg suitcase while waiting for a bus for 15 minutes?

an egg is thrown straight up at the edge of a 100m cliff with an initial velocity of 20m/s. how long will it take for the egg to hit the ground below?

Which situation is an an example of competition that could be found in the grassland

Which type of radiation travels at the speed of light and penetrates matter easily?

Why does it hurt your hands when you carry heavy shopping in carrier bags?

Why did scientists choose carbon as a base for the atomic mass unit? Which isotope of carbon did they use?

What organelle is found in all animal cells and some plant cells

Basic of Archimedes's principle of how fluid can make body to float and sink.

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force (in N) exerted on a 0.0500 kg bullet to accelerate it to a speed of 625 m/s in a time of 1.10 ms (milliseconds)