One study suggests that a brain concussion can occur if a person’s head is subjected to an acceleration assmall as 60g, where g is the acceleration of gravity. (a) If the massof the person’s head is 4.8 kg, what is the magnitude of the force?(b) If the impulse delivered to the person’s head is 18 kg # m>s, overwhat time interval is the force applied?

A car (VW) and a truck (C) collide inelastically (stick together). The impact is made in a very short time of Δt = 0.1 s. Initial speeds:UVW = 40.0 m / sUC = 30.0 m / sMasses:MVW = 900.0 kgMC = 2000.0 kg d) Determine the average vector accelerationAVW =                     AC = e) Vector average force on C and VW. (Do you notice something important in the results?).FVW =                        FC = f) For the case of truck C, determine its :   ΔP = Solve all subsections

Where necessary assume g = 9.8 m s-² 1. A vehicle has a mass of 1800 kg. Its engine provides a forward force of 2.5 kN, but the motion is resisted by a constant frictional force of 340 N. Calculate a) the acceleration of the vehicle, b) its momentum 6.0 s after starting to move.

a) Compute the impulse necessary to bring to rest the 50.0 kg driver of an automobile initially moving at 25.0 m/s. (b) Find the average force on the driver if the deceleration is accomplished gradually by the application of brakes over a 10.0 s interval. (c) Find the average force if the car is stopped in a collision that brings the driver’s seat to rest in 0.100 s, assuming the driver is restrained by a seat belt. What are the functions of seat belts and airbags in a collision?

You have been hired as an expert witness in a court caseinvolving an automobile accident. The accident involvedcar A of mass 1500 kg which crashed into stationary car Bof mass 1100 kg. The driver of car A applied his brakes15 m before he skidded and crashed into car B. After thecollision, car A slid 18 m while car B slid 30 m. The coefficient of kinetic friction between the locked wheels and the road was measured to be 0.60. Show that the driver of car A was exceeding the 55 mi/h (90km/h) speed limit before applying the brakes.

Drops of rain fall perpendicular to the roof of a parkedcar during a rainstorm. The drops strike the roof with a speedof 12 m/s, and the mass of rain per second striking the roofis 0.035 kg/s. (a) Assuming the drops come to rest after strikingthe roof, find the average force exerted by the rain on theroof. (b) If hailstones having the same mass as the raindropsfall on the roof at the same rate and with the same speed, howwould the average force on the roof compare to that found inpart (a)?

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force (in N) exerted on a 0.0500 kg bullet to accelerate it to a speed of 675 m/s in a time of 5.00 ms (milliseconds)? (Enter the magnitude.)