The kinetic energy is given by:
We know the mass and the maximum speed, plugging their values in the expression above we have:
Therefore, the answer is d.
Try C. a downward gravitational force exerted by Earth
Answer:
Friction force on the bullet is 58.7 N opposite to its velocity
Explanation:
As we know that initial speed of the bullet is 55 m/s
after travelling into the sand bag by distance d = 1.34 m it comes to rest
so final speed
now we can use kinematics top find the acceleration of the bullet
so we have
now by Newton's II law we know that
so we have
B. Orbit. The planets orbit the sun, the moon orbits earth, etc.
1. Cenozoic ERA
2. Mesozoic ERA
3. Paleozoic ERA