Car 1 goes around a level curve at a constant speed of 65 km/h. the curve is a circular arc with a radius of 95 m. if car 2 went around a different level curve at twice the speed of car 1, how much larger would the radius of the curve that car 2 travels have to be in order that the centripetal accelearations of both cars be the same? ov2 times as large o2 times as large 2v2 times as large 4 times as large 16 times as large submit

You carry a 7.0-kg bag of groceries 1.2 m above the ground at constant speed across a 2.7m room. how much work do you do on the bag in the process? (a) 157j (b) 0.00j (c) 185j (d) 82j

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?