A small car collides with a large truck in a head-on collision. Which of the following statements concerning the MAGNITUDE of the average collision FORCE is correct? O impossible to tell because the masses and velocities are not given the small car experiences a greater average force O the large truck experiences a greater force the small car and the truck experience the

A car of mass m moves with a speed of Vo. The driver suddenly sees another car, of mass 3m, sitting at rest. The driver slams on the brakes. The coefficent of kinetic friction between the car and the road is μk. a) How far away must the second car be if the first car is to stop exactly in time to avoid hitting it? b) Suppose the car is a distance of d/2 away where d is the distance you found in part (a). Find the momentum of the car as it collides with the car at rest. c) Use conservation of momentum to calculate the speeds of both cars after the collision.

Force Exerted on an Object vs. Time 8 3 Time (s) Which of the following statements about the graph is correct? Your answer: O The area between the line and the x-axis could be the object's change in momentum (or impulse). O The area between the line and the x-axis could be the power exerted on the object. O The slope of the line could be the object's change in momentum (or impulse). O The slope of the line could be the power exerted on the object. O Neither of these values could be found from the graph. Force (N) 00

Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this? Many people imagine that the collision force exerted on the car is much greater than that exerted on the truck. To substantiate this view, they point out that the car is crushed, whereas the truck is only dented. This idea of unequal forces, of course, is false; Newton's third law tells us that both objects are acted upon by forces of the same magnitude. The truck suffers less damage because it is made of stronger metal. But what about the two drivers? Do they experience the same forces? To answer this question, suppose that each vehicle is initially moving at 7.70 m/s and that they undergo a perfectly inelastic head-on collision. Each driver has mass 72.0 kg. Including the masses of the drivers, the total masses of the vehicles are 800 kg for the car and 4,000 kg for the truck. If the collision time is 0.110 s,…