Amotorcyclist heading east through a small town accelerate at constant 4.0meter per seconds square after he leaves the limits. at t=0 he is 5.0m east of the city limit signposts, moving east at 15 m/s. (a) find his position and velocity at t=2.0secs. (b)where is he when his velocity is 25m/secs.

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? ?

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your