Whiplash injuries during an automobile accident are caused by the inertia of the head. If someone is wearing a seatbelt, her body will tend to move with the car seat. However, her head is free to move until the neck restrains it, causing damage to the neck. Brain damage can also occur. FIGURE 1 shows two sequences of head and neck motion for a passenger in an auto accident. One corresponds to a head-on collision, the other to a rear-end collision. Which is which? Explain

Two people, one with a mass of 60 kg and one with a mass of 45 kg, sit on 5 kg frictionless carts that are initially at rest on a flat surface. The lighter person pushes on the more massive person, causing the latter to accelerate at a rate of 3.0 m/s2 toward the east. What are the magnitude and direction of the lighter person’s acceleration vector? The acceleration is_____  m/s2 toward the  choose one ( East, West, North , south)

Alice and Bob had car trouble. Their car broke down and Bob could not restart it. Alice got out to push the car and after some time she asked Bob if he would trade jobs with her for a while. Bob answered, "It won't matter if I do. I took physics, and I know that no matter how hard I push on the car, it will push back on me just as hard so I won't accomplish anything. That's Newton's Third Law and it is always true. It has been tested millions of times. It wouldn't matter if I pushed the car. I wouldn't be able to push it anywhere." Aside from the fact that his relationship with Alice is probably fınished, which of the following correctly explains a flaw in Bob's logic? The third law says that the two forces he is talking about are only approximately equal. The third law does not apply in this case because the car is on wheels. O The two forces he is talking about are on two different objects. Thw two forces will not be the same because the two masses are different. The third law only…

Please don't provide handwritten solution....

In the movie The Rocketeer, a teenager discovers a jet-powered backpack in an old barn. The backpack allows him to fly at incredible speeds. In one scene, however, he uses the backpack to rapidly accelerate an old pickup truck that is being chased by “bad guys.” He does this by bracing his arms against the cab of the pickup and firing the backpack, giving the truck the acceleration of a drag racer. Is the physics of this scene “Good,”“Bad,” or “Ugly?” Draw and Explain.

Your mass is 77.1 kg, and the sled s mass is 22.3 kg. The sled is moving by itself on the ice at 4.72 m/s. You parachute vertically down onto the sled, and land gently. What is the sled s velocity with you now on it?     1.38 m/s     1.22 m/s     1.06 m/s     0.53 m/s

A lump of clay of mass 0.28 kg is dropped from a height of 10.8 m. The clay comes to a full stop  0.075 s after the moment it first touched the ground. What is the magnitude in newtons of the average force of impact that the clay experienced? Express your answer in two decimal places, with units of Newtons.

Consider the three boxes m₂=8.83 kg, m=10.6 kg and m=4.72 kg which are connected by massless cords passing over frictionless pulleys. The box mrests on a frictionless tabletop while box m and box mare suspended at the ends of the cords connected to box m₁. What is the magnitude of acceleration and direction of motion of box m when the system is released from rest? mb ma mc 1.67 meters per second squared, downward 2.74 meters per second squared, upward 2.74 meters per second squared, downward 1.67 meters per second squared, upward