A 1000-kg car has 50,000 joules of kinetic energy. What is the speed?

Physics

2 answers:

bixtya [17]3 years ago

5 0

Answer:

½mv²= KE

½(1000)?²= 50000

500 500

? ²=100

Square root

?= 10

10 m/s is you answer

djyliett [7]3 years ago

4 0

K.E = 1/2mv^2

The kinetic energy is 50,000 J and the mass of the car is 10,000 kg.

50,000 J = 1/2(10,000kg)v^2
Solve for v (velocity)
50,000 J = 5,000 kg x v^2
10 = v^2
$\sqrt{10} = v$
about 3 m/s (in terms of significant figures)

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The body weighing 2 kg moves through the horizontal surface and crosses the path x = 75 cm The coefficient of friction of the bo

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As the weight of the body is 2 kg, the normal force acting on it will be mass multiplied with acceleration due to gravity.

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