What is the kinetic energy of a bus of mass 10,000 kg and velocity 30ms-1?
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Question 2: A car having mass of 1500 kg achieve the velocity of 5 m/s in 10 second. Calculate the required force to attain required speed by car.
Solution: According to the question:
Initial velocity (u) = 0, final velocity (v) = 5m/s, time (t) = 10 second, Mass (m) = 1500 kg,
Therefore, force (F)=?
We know that, Force (F) =mv−ut=mv-ut
∴F=1500 kg 5 m/s−010 s∴F=1500 kg 5 m/s-010 s
⇒F=1500 kg×12 ms−2⇒F=1500 kg×12 ms-2
⇒750 kg ms−2⇒750N⇒750 kg ms-2⇒750N
Thus required force = 750 N
Solution: According to the question:
Initial velocity (u) = 0, final velocity (v) = 5m/s, time (t) = 10 second, Mass (m) = 1500 kg,
Therefore, force (F)=?
We know that, Force (F) =mv−ut=mv-ut
∴F=1500 kg 5 m/s−010 s∴F=1500 kg 5 m/s-010 s
⇒F=1500 kg×12 ms−2⇒F=1500 kg×12 ms-2
⇒750 kg ms−2⇒750N⇒750 kg ms-2⇒750N
Thus required force = 750 N
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