12. A boy of mass 50 kg running 5m/s jumps on to a 20kg trolley

travelling in the same direction at 1.5m/s. Find their common

velocity. Assume that there is no external unbalanced force

working in the horizontal direction.

A car starts from rest and is accelerated at 5 m/s2 for 10 seconds what is the final velocity

1) The earths gravity is pulling on you, Are you pulling on the earth Explain your reasoning with evidence. 2) Gravity is a force of attraction between objects based on their mass and their distance apart.

How does the average speed of light in glass?

Al is floating freely in her spacecraft, and you are accelerating away from her with an acceleration of 1g. 5) How will you feel in your spacecraft? A) You will be floating weightlessly. B) You will feel weight, but less than on Earth.

How are thermal energy mechanical energy similar

a man applies a force of 100n to a rock for 60 seconds but the rock does not move what is the amount of work done by the man on the rock

The driver of a car traveling at 32 m/s applies the brakes and undergoes a constant deceleration of 2.25 m/s^2.

You are going to develop some photographic film that involves a chemical reaction between the developer, which you will mix yourself, and a chemical on the surface of the film.

Would time travel mean that parallel universes would be created off our linear time sequence to ensure the universe doesn't collapse itself because of significant events being drastically changed in the way it shapes the universe?

What is the central core of hair