PHYS Straighter line exams questions and answers

A 200 g plastic ball is at rest on a friction less incline 0.658 m above the surface of a table. The ball then rolls down the incline and across the table, coming to rest after a distance of 2.45 m. Which of the following the average friction on the ball while rolling across the table. - 0.527 N A power company charges its customers for electricity based upon which one of the following? - energy Car 1 of mass 700 kg is slowly moving along at 0.500 m / s when it is hit from behind by car 2 speeding along at 15.0 m / s. After collision, car 1 has a new speed of 8.00 m / s in the same direction. Which of the following is the force with which car 2 must have struck car 1, if the collision lasted for 0.932 s? Also, knowing that conservation of momentum applies to the situation, what is car 2's speed after the collision (v2 f ) if it has a mass of 850 kg? - F = 5.63 × 103 N v2 f = 8.82 m / s A motorcycle is moving with a speed of 8.3 m / s when it begins to brake and slow down at a constant rate. If the acceleration is 3.1 m / s2, how much further will the motorcycle travel before it comes to a complete stop? - 11 m Where does the conc