A 7.80 - g bullet moving at 575 m/s penetrates a tree trunk toa depth of 5.50 cm. (a) Use work and energy considerationsto find the average frictional force that stops the bullet.(b) Assuming the frictional force is constant, determine howmuch time elapses between the moment the bullet enters thetree and the moment it stops moving.

Question
Asked Dec 17, 2019
1 views

A 7.80 - g bullet moving at 575 m/s penetrates a tree trunk to
a depth of 5.50 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.

check_circle

Expert Answer

Step 1

 

 (a)

The equation for the work done in terms of force is

fullscreen
Step 2

Substituting the values gives

help_outline

Image Transcriptionclose

1.29 ×10°J F = 5.5 x10m = 2.34x10*N

fullscreen
Step 3

(b)

The acceleration in ...

help_outline

Image Transcriptionclose

a = m 2.34×10°N 7.80x10 kg = 3.0 x10°m/s

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Physics

Work,Power and Energy

Related Physics Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes t...

A: (a) Write the kinematic relation final velocity, acceleration and time travelled

question_answer

Q: A force of 30.0 N is applied in the positive x - direction to ablock of mass 8.00 kg, at rest on a f...

A: Given data:Applied force, F = 30.0 NMass of the block, m = 8.0 kgInitial velocity of the block, u = ...

question_answer

Q: In 2015, the U.S. national debt was about $18 trillion.(a) If payments were made at the rate of $1 0...

A: Click to see the answer

question_answer

Q: (a) What is the minimum force of friction required to hold the system of Figure P4.74 in equilibrium...

A: Given:

question_answer

Q: what part of the electromagnetic spectrum is most absorbed by water?

A: A material absorbs light when the natural frequency of oscillation of that material matches with the...

question_answer

Q: I don’t know the answer

A: Given:Mass of the block (m) = 3 kgForce applied on the block (F) = 2 NForce applied for time (t) = 6...

question_answer

Q: A stuntman sitting on a tree limb wishes to drop verticallyonto a horse galloping under the tree. Th...

A: (a)From the kinematics equation, the time taken by the stuntman to reach the saddle is,

question_answer

Q: A daredevil is shot out of a cannon at 45.0° to the horizontalwith an initial speed of 25.0 m/s. A n...

A:  Given:Angle = 45oInitial velocity = 25 m/sHorizontal distance, d = 50  m

question_answer

Q: The driver of a car slams on her brakes to avoid colliding witha deer crossing the highway. What hap...

A: Click to see the answer