Q. 1

Expert-verifiedFound in: Page 227

Book edition
4th

Author(s)
Randall D. Knight

Pages
1240 pages

ISBN
9780133942651

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?

Bullet has larger kinetic energy compared to student.

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

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

Calculate the kinetic energy using

KE = 1/2(mv^{2})

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

KE_{Bullet} =1/2(0.010kg)(500m/s)^{2} = 1250 J

Similarly

KE_{student }= 1/2(75kg)(5.5m/s)^{2} = 1134.38 J

We can see KE_{bullet }> KE_{student}

94% of StudySmarter users get better grades.

Sign up for free