A truck of mass 1200kg moving with a velocity of 90km hour collides wi

1.	A truck of mass 1200kg moving with a velocity of 90km hour collides with a car of mass 1000kg moving towards the truck with a speed of 36km/h. If the collision last for 5 seconds and if after collision they both got stuck to each other and moved together then calculate the velocity of the entangled truck-car system
Answer» EXPLANATION: MASS of the motorcar, M=1200kg Initial velocity of the CAR, u=90 km/h=25 m/s (∵1km/h=185m/s) Final velocity of the car, v=18 km/h=5 m/s TIME taken t=4 s ΔP=mv−mu ΔP=1200×5−1200×25=−24000 KG m/s v=u+at 5=25+a×4 ⟹a=−5 m/s2 (-ve shows retardation) ∣F∣=m∣a∣=1200×5=6000 N

A truck of mass 1200kg moving with a velocity of 90km hour collides with a car of mass 1000kg moving towards the truck with a speed of 36km/h. If the collision last for 5 seconds and if after collision they both got stuck to each other and moved together then calculate the velocity of the entangled truck-car system

Answer»

EXPLANATION:

MASS of the motorcar, M=1200kg

Initial velocity of the CAR, u=90 km/h=25 m/s (∵1km/h=185m/s)

Final velocity of the car, v=18 km/h=5 m/s

TIME taken t=4 s

ΔP=mv−mu

ΔP=1200×5−1200×25=−24000 KG m/s

v=u+at

5=25+a×4

⟹a=−5 m/s2 (-ve shows retardation)

∣F∣=m∣a∣=1200×5=6000 N

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