A car of mass 2500 kg collides with a truck of mass 4200 kg, and just after the collision the car and truck slide along, stuck together, with no rotation. The car's velocity just before the collision was < 38, 0, 0 > m/s, and the truck's velocity just before the collision was < -18, 0, 29 > m/s. (a) Your first task is to determine the velocity of the stuck-together car and truck just after the collision. What system and principle should you use? Z Momentum principle O Truck alone O Car alone O Energy principle V Car plus truck (b) What is the velocity of the stuck-together car and truck just after the collision? m/s (c) In your analysis in part (b), why can you neglect the effect of the force of the road on the car and truck? O Short collision time, negligible imputse compared to large impulse acting between car and truck. O The road doesn't exert forces on the car or truck and doesn't affect the vehicles. (d) What is the increase in internal energy of the car and truck (thermal energy and deformation)? AE = (e) What kind of collision is this? O elastic O Inelastic

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A car of mass 2500 kg collides with a truck of mass 4200 kg, and just after the collision the car and truck slide along, stuck together, with no rotation. The car's velocity just before the
collision was< 38, 0, 0 > m/s, and the truck's velocity just before the collision was < -18, 0, 29 > m/s.
(a) Your first task is to determine the velocity of the stuck-together car and truck just after the collision. What system and principle should you use?
V Momentum principle
Truck alone
Car alone
Energy principle
V Car plus truck
(b) What is the velocity of the stuck-together car and truck just after the collision?
m/s
(c) In your analysis in part (b), why can you neglect the effect of the force of the road on the car and truck?
O Short collision time, negligible impulse compared to large impulse acting between car and truck.
O The road doesn't exert forces on the car or truck and doesn't affect the vehicles.
(d) What is the increase in internal energy of the car and truck (thermal energy and deformnation)?
AE =
(e) What kind of collision is this?
elastic
O inelastic
Transcribed Image Text:A car of mass 2500 kg collides with a truck of mass 4200 kg, and just after the collision the car and truck slide along, stuck together, with no rotation. The car's velocity just before the collision was< 38, 0, 0 > m/s, and the truck's velocity just before the collision was < -18, 0, 29 > m/s. (a) Your first task is to determine the velocity of the stuck-together car and truck just after the collision. What system and principle should you use? V Momentum principle Truck alone Car alone Energy principle V Car plus truck (b) What is the velocity of the stuck-together car and truck just after the collision? m/s (c) In your analysis in part (b), why can you neglect the effect of the force of the road on the car and truck? O Short collision time, negligible impulse compared to large impulse acting between car and truck. O The road doesn't exert forces on the car or truck and doesn't affect the vehicles. (d) What is the increase in internal energy of the car and truck (thermal energy and deformnation)? AE = (e) What kind of collision is this? elastic O inelastic
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