Initialt= 0.4 sFinalt= 0.8 s4. A pyrotechnician releases a 3-kg firecracker from rest.At t = 0.4 s, the firecracker is moving downward withspeed 4 m/s. At this same instant, the firecracker beginsto explode into two pieces with masses mop = 1 kg andmpottom = 2 kg. At the end of the explosion (t = 0.8 s), thetop piece is moving upward with speed 4 m/s.lū= 4 m/sm = 3 kgmop = 1 kgThe mass of the explosive substance is negligible incomparison to the mass of the two pieces.löl=4 m/sMotom = 2 kgThe questions below can serve as a guide to completingthe diagram below right:bottom= ?a. Determine the magnitude of the net force on thefirecracker system before the explosion.(Use g = 10 m/s².) Explain.ChangeFinal130.8 sInitialt= 0.4 sb. Determine the magnitude of the net force on thefirecracker system at an instant during the explosion.(Hint: Does the net force on a system depend on forcesthat are internal to that system?)Popc. Determine the magnitude and direction of the netimpulse (Fret At) on the firecracker system during theexplosion (i.e., over the interval from t = 0.4 s untilt = 0.8 s). Explain.Pottomd. Use the impulse-momentum theorem (Fet At = Ap) todetermine the magnitude and direction of the change inmomentum of the firecracker system during theexplosion. Enter this vector in the table using the scaleset by the initial momentum of the system.e. Determine the final momentum of the firecrackersystem and enter it in the table. (Hint: Is it the same asthe initial momentum?)systemf. Complete the vector diagram at right.12 kg-m/s

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Description: Initialt= 0.4 sFinalt= 0.8 s4. A pyrotechnician releases a 3-kg firecracker from rest.At t = 0.4 s, the firecracker is moving downward withspeed 4 m/s. At this same instant, the firecracker beginsto explode into two pieces with masses mop = 1 kg and

Given:- The mass of the firecracker is m = 3 kg in the rest and at time t = 0.4 sec the velocity of…

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À pyrotechnician releases a 3-kg firecracker from re At t = 0.4 s, the firecracker is moving downward wi speed 4 m/s. At this same instant, the firecracker be to explode into two pieces with masses mop = 1 kg a mbottom = 2 kg. At the end of the explosion (t = 0.8 s) top piece is moving upward with speed 4 m/s. %3D %3D The mass of the explosive substance is negligible in comparison to the mass of the two pieces.

À pyrotechnician releases a 3-kg firecracker from re At t = 0.4 s, the firecracker is moving downward wi speed 4 m/s. At this same instant, the firecracker be to explode into two pieces with masses mop = 1 kg a mbottom = 2 kg. At the end of the explosion (t = 0.8 s) top piece is moving upward with speed 4 m/s. %3D %3D The mass of the explosive substance is negligible in comparison to the mass of the two pieces.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Topic Video

Question

Initial
t= 0.4 s
Final
t= 0.8 s
4. A pyrotechnician releases a 3-kg firecracker from rest.
At t = 0.4 s, the firecracker is moving downward with
speed 4 m/s. At this same instant, the firecracker begins
to explode into two pieces with masses mop = 1 kg and
mpottom = 2 kg. At the end of the explosion (t = 0.8 s), the
top piece is moving upward with speed 4 m/s.
lū= 4 m/s
m = 3 kg
mop = 1 kg
The mass of the explosive substance is negligible in
comparison to the mass of the two pieces.
löl=4 m/s
Motom = 2 kg
The questions below can serve as a guide to completing
the diagram below right:
bottom
= ?
a. Determine the magnitude of the net force on the
firecracker system before the explosion.
(Use g = 10 m/s².) Explain.
Change
Final
130.8 s
Initial
t= 0.4 s
b. Determine the magnitude of the net force on the
firecracker system at an instant during the explosion.
(Hint: Does the net force on a system depend on forces
that are internal to that system?)
Pop
c. Determine the magnitude and direction of the net
impulse (Fret At) on the firecracker system during the
explosion (i.e., over the interval from t = 0.4 s until
t = 0.8 s). Explain.
Pottom
d. Use the impulse-momentum theorem (Fet At = Ap) to
determine the magnitude and direction of the change in
momentum of the firecracker system during the
explosion. Enter this vector in the table using the scale
set by the initial momentum of the system.
e. Determine the final momentum of the firecracker
system and enter it in the table. (Hint: Is it the same as
the initial momentum?)
system
f. Complete the vector diagram at right.
12 kg-m/s

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A 3.000 kg ball is pitched with a kinetic energy of 20.00 Joules. Then the momentum of the ball is A. 7.500 kg m/s. B. 8.350 kg m/s. C. 9.450 kg m/s. D. 10.95 kg m/s. E 12.50 kg m's.