Question

kinetic energy - answer questions in red
analyze and solve the problem presented in the scenario below.
a 12,000 - kg truck is traveling with a velocity of 37.6 m/s. a 1,200 - kg car is traveling next to the truck. how fast should the car go so it can have the same kinetic energy as the truck? *hint: solve the ke of the truck first then the velocity of the car. show your work and units.
kinetic energy requires
if mass is constant, the higher the velocity, the the kinetic energy.
if velocity is constant, the higher the mass, the the kinetic energy.
james (50 kg) runs at a velocity of 8.5 m/s. if james is also carrying a 5 - kg backpack, what would be his kinetic energy?
an object moving with a speed of 35 m/s and has a kinetic energy of 1500 j, what is the mass of the object?
an object has a kinetic energy of 14 j and a mass of 17 kg, how fast is the object moving?
an object has a kinetic energy of 25 j and a mass of 34 kg, how fast is the object moving?
what is the kinetic energy of a 100 kg object that is moving with a speed of 12.5 m/s?
what is the kinetic energy of a 478 kg object that is moving with a speed of 15 m/s?

Explanation:

Step1: Calculate the kinetic energy of the truck

The formula for kinetic energy is \(KE=\frac{1}{2}mv^{2}\). For the truck, \(m = 12000\space kg\) and \(v = 37.6\space m/s\).

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Step2: Calculate the velocity of the car

Since \(KE_{car}=KE_{truck}\), and for the car \(m = 1200\space kg\), using \(KE=\frac{1}{2}mv^{2}\), we can solve for \(v\).

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Answer:

The car should go at a speed of \(119\space m/s\)