The momentum of a type bumper at an amusement park should not exceed 2100kgm/s to ensure the safety of the visitors to the park. if each bumber car has the mass of 780kg will the ride be safe if the bumper car are limited to a top speed of 3m/s

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? ?

Which of the following is a true statement about the acceleration ~a of the pendulum bob ~a is equal to the acceleration due to gravity. ~a is perpendicular to the bob’s trajectory. ~a is equal to the instantaneous rate of change in velocity. ~a is tangent to the bob’s trajectory.

What radiation has a higher frequency than visible light