Question

A 7.80-g bullet moving at 480 m/s penetrates a tree trunk to a depth of 6.60...

A 7.80-g bullet moving at 480 m/s penetrates a tree trunk to a depth of 6.60 cm.

(a) Use work and energy considerations to find the average frictional force that stops the bullet.

(b) Assuming the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A 7.80-g bullet moving at 520 m/s strikes the hand of a superhero, causing the hand...
A 7.80-g bullet moving at 520 m/s strikes the hand of a superhero, causing the hand to move 5.90 cm in the direction of the bullet's velocity before stopping. (a) Use work and energy considerations to find the average force that stops the bullet. N (b) Assuming the force is constant, determine how much time elapses between the moment the bullet strikes the hand and the moment it stops moving. s
A bullet of mass 4 g moving with an initial speed 400 m/s is fired into...
A bullet of mass 4 g moving with an initial speed 400 m/s is fired into and passes through a block of mass 5 kg, as shown in the figure. The block, initially at rest on a frictionless, horizontal surface, is connected to a spring of force constant 538 N/m. If the block moves a distance 1.3 cm to the right after the bullet passed through it, find the speed v at which the bullet emerges from the block and...
A bullet of mass 0.04 kg moving with a speed of 90 m/s enters a heavy...
A bullet of mass 0.04 kg moving with a speed of 90 m/s enters a heavy wooden block and is stopped after a distance of 60 cm. What is the average resistive force exerted by the block on the bullet?
A 5.00-g bullet moving with an initial speed of v0 = 410 m/s is fired into...
A 5.00-g bullet moving with an initial speed of v0 = 410 m/s is fired into and passes through a 1.00-kg block, as in the figure below. The block, initially at rest on a frictionless horizontal surface, is connected to a spring with a spring constant of 940 N/m. (a) If the block moves 5.00 cm to the right after impact, find the speed at which the bullet emerges from the block. (b) If the block moves 5.00 cm to...
A 60-g bullet is fired from a rifle having a barrel 0.620 m long. Assuming the...
A 60-g bullet is fired from a rifle having a barrel 0.620 m long. Assuming the origin is placed where the bullet begins to move, the force (in newtons) exerted by the expanding gas on the bullet is 18000 + 10000x - 10000x2, where x is in meters. (a) Determine the work done by the gas on the bullet as the bullet travels the length of the barrel.   kJ (b) How much work would be done if the barrel were...
1. A 150 g particle at x = 0 is moving at 2.00 m/s in the...
1. A 150 g particle at x = 0 is moving at 2.00 m/s in the +x-direction. As it moves, it experiences a force given by Fx=(0.750N)sin(x/2.00m). Part A: What is the particles speed when it reaches x = 3.14 m? Express your answer with the appropriate units. 2. Hook's law describes an ideal spring. Many real springs are better described by the restoring force (FSp)s=−kΔs−q(Δs)3, where q is a constant. Consider a spring with k = 200 N/m and...
Cart C is moving to the right at 3 m/s toward cart D, which is at...
Cart C is moving to the right at 3 m/s toward cart D, which is at rest. The cart collide in an elastic collision, and after the collision cart D is moving to the right at 2.4 m/s. The mass of cart C is 2kg and the mass of cart D is a 3kg. What is the total momentum of the cart C + cart D system before the collision? What is the speed and direction of cart C after...
3) A 3 kg block is sliding at an initial speed of 9 m/s across a...
3) A 3 kg block is sliding at an initial speed of 9 m/s across a surface, encountering a constant friction force of 10 N. How much work is done on the block after it slides 25 cm? Correct, computer gets: -2.50 J Hint: Does the block gain or lose energy during this process? What sign does this imply for the work done on it? 4) How fast is the block moving after sliding 25 cm? Correct, computer gets: 8.91...
21) A person carries a 25.0-N rock through the path shown in the figure, starting at...
21) A person carries a 25.0-N rock through the path shown in the figure, starting at point A and ending at point B. The total time from A to B is 1.50 min. How much work did gravity do on the rock between A and B? A) 625 J B) 20.0 J C) 275 J D) 75 J E) 0 J 22) A person carries a 2.00-N pebble through the path shown in the figure, starting at point A and...
1. Starting from rest, a CD takes 3.0 s to reach its operating angular velocity of...
1. Starting from rest, a CD takes 3.0 s to reach its operating angular velocity of 450 rpm. The mass of a CD is 17 g and its diameter is 12 cm. You may assume that the small opening at the center of the CD is unimportant when calculating the rotational inertia. Assume that the angular acceleration is constant. a. What is the rotational kinetic energy of the CD after it has completely spun up? b. How high off the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT