Chapter 9: 9.Q. 1 (page 227)

Which has the larger kinetic energy, a 10 g bullet fired at
500 m/s or a 75 kg student running at 5.5 m/s?

Short Answer

Expert verified

Bullet has larger kinetic energy compared to student.

Step by step solution

Given

Mass of bullet = 10 g bullet and velocity 500 m/s

Mass of student = 75 kg and velocity= 5.5 m/s?

Explanation

Calculate the kinetic energy using $K . E . = 0.5 \times m \times v^{2} . . . . . . . . . . . . . . . . . . . . . . . . . . . . (1)$

Now find the kinetic energy of bullet and students using the equation (1)

$K E_{b u l l e t} . = 0.5 \times m \times v^{2} K E_{b u l l e t} = 0.5 \times 0.010 \times 500^{2} = 1250 J$

Similarly

$K E_{s t u d e n t} = 0.5 \times m \times v^{2} K E_{s t u d e n t} = 0.5 \times 75 \times 5 . 5^{2} = 1134.38 J$

We can see KE_bullet> KE_student

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Which has the larger kinetic energy, a 10 g bullet fired at
500 m/s or a 75 kg student running at 5.5 m/s?

Short Answer

Step by step solution

Given

Explanation

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Which has the larger kinetic energy, a 10 g bullet fired at500 m/s or a 75 kg student running at 5.5 m/s?

Short Answer

Step by step solution

Given

Explanation

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Physics Textbooks

Thermodynamics

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Study anywhere. Anytime. Across all devices.

Which has the larger kinetic energy, a 10 g bullet fired at
500 m/s or a 75 kg student running at 5.5 m/s?