Physics for Scientists & Engineers, Volume 2 (Chapters 21-35)
5th Edition
ISBN: 9780134378046
Author: GIANCOLI, Douglas
Publisher: PEARSON
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Chapter 38, Problem 10Q
To determine
The conclusion that can be made about momentum if the position of an object is known precisely.
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What is the change in the y-component of the momentum (kg*m/s)?
A particle of mass m moves with a momentum of magnitude p.
Show that the kinetic energy of the particle KE = p2/2m
Question 8: An object starts moving with an initial velocity of 2 m/s with constant acceleration of
The correct relationship between the kinetic energy (K) and momentum (P) is ....
Question 5:
(a) K=P?/2m
(b) K=P/2m
(c) K=P/2m
(d)
K=P/4m
Question 6:
The product of an object's mass and its velocity is
(a) | Momentum
(b) Kinetic energy
(c) Potential
(d)
the work done
energy
The direction of friction force is always similar to the direction in which the cbiet
Question 7:
is moving.
(b) False
(a) True
Question 8:
4 m/s, what is its displacement after 1 sec?
(b) | 14 m
(c) 4 m
(а) | 40 m
(d) 0.4 m
Chapter 38 Solutions
Physics for Scientists & Engineers, Volume 2 (Chapters 21-35)
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- (a) Find the momentum of a asteroid heading towards Earth at 30.0 km/s. (b) Find the ratio of this momentum to the classical momentum. (Hint: Use the approximation that at low velocities.)arrow_forwardShow that the kinetic energy of a particle of mass m is related to the magnitude of the momentum p of that particle by KE = p?/2m. (Note: This expression is invalid for particles traveling at speeds near that of light.) (Submit a file with a maximum size of 1 MB.) Choose File no file selected This answer has not been graded yet.arrow_forwardMust the total energy of a system be conserved whenever its momentum is conserved? Explain why or why not.arrow_forward
- Nuclear Fusion Reaction In a human-scale model of a nuclear fusion reaction, two "deuterons" smash together head-on. Each has a mass of 2.0147kg and is moving at speed vd. The result is a "Helium-3 nucleus" (mass 3.0160kg) and a separate "neutron" (mass 1.0090kg). Amazingly, this reaction produces a positive Wnc of 3.96 × 10 14 J -- by converting mass into kinetic energy as predicted by Einstein's E mc² = The "neutron" moves with a speed of un after the reaction. E 4 ☑ Vd 1.57×107 m (no answer) Correct Answer: 3.64 S Un ×107 m S + + D D 3Не N. Proton Neutron http://fusion.srubar.netarrow_forwardThe speed of the object is 2 rn/s. Calculate the mass of the object when its momentum is 12 kg•m/s.arrow_forwardHow long should a force of 50 N be applied to change the momentum of an object by 12 kg • m/s?arrow_forward
- A ball of mass 0.4kg is thrown at a wall. It strikes the wall with a speed of 1.5ms−1 perpendicular to the wall and bounces off the wall with a speed of 1.2ms−1. Calculate the changes in momentum and kinetic energy which happen in the collision between the ball and the wall.arrow_forwardKE of a particle is increased by 300% . Find the percentage increase in momentum.arrow_forwardA spaceship has length 120 m, diameter 25 m, and mass 4.0 x 103 kg as measured by its crew. As the spaceship moves parallel to its cylindrical axis and passes us, we measure its length to be 90 m. (a) What do we measure its diameter to be? (b) What do we measure the magnitude of its momentum to be?arrow_forward
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