3. A driver who is moving at 15 m/s, sees a stop light and puts on the brakes 30 m before an intersection. a) What acceleration will the driver have to have to stop before entering the intersection?
b) How much time will it take to stop the car?

How is the gravitational force related to the distance between two objects?

Which best represents the law of conservation of mass ?

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?