Physics

Physics, 20.10.2019 07:30, kat9940

What impulse results if the force acting on an object is described by the force-time graph shown?
0.50 kgm/s
0.60 kgm/s
1.3 kgm/s
2.1 kgm/s

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Physics, 13.07.2019 19:20, heids17043

Think about this and explain fully : ) a 2-kg object accelerates as a net external force is applied to it. during the 5-second interval that the force is applied, the object's velocity changes from 3 m/s east to 7 m/s west. several students discussing the impulse on this object state the following: student #1: "the impulse is equal to the change in momentum, which is (2 kg)(3 m/s + 7 m/s) = 20 kg m/s." student #2: "but the change in velocity is 4 m/s. we multiply by the mass to get the change in momentum, and also the impulse, which is 8 kg m/s." student #3: "the change in momentum of this object during these 5 seconds was 8 kg m/s, so the impulse applied to this object during these 5 seconds was 8/5 kg m/s." student #4: "the impulse is the force f times the time t, and since we don't know the force, we can't find the impulse for this situation." with which, if any, of these students do you agree? explain your choice and your reasoning.

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Physics, 01.10.2019 10:50, deon4257

The force shown in the attached figure is the net eastward force acting on a ball. the force starts rising at t = 0.012 s, falls back to zero at t = 0.062 s, and reaches a maximum force of 35 n at the peak. determine with an error no bigger than 25% (high or low) the magnitude of the impulse (in n-s) delivered to the ball. hint: do not use j = fδt. look at the figure. find the area of a nearly equally sized triangle.

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Physics, 18.10.2019 00:00, probablyacommunist

Aconstant net force that has a magnitude of 135.5 n is exerted on a 26.7 kg object that is initially not moving. a. draw a free body diagram of the object. assume there is only the net force of 135.5 n acting on the object. b. what acceleration does this force produce? c. sketch a position vs. time graph for the object. d. sketch a velocity vs.. time graph for the object. e. how far does the the object travel in 8.82 s?

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Physics, 07.11.2019 05:31, mikego5

To understand the relationship between force, impulse, and momentum. the effect of a net force σf⃗ acting on an object is related both to the force and to the total time the force acts on the object. the physical quantity impulse j⃗ is a measure of both these effects. for a constant net force, the impulse is given by j⃗ =f⃗ δt. the impulse is a vector pointing in the same direction as the force vector. the units of j⃗ are n⋅s or kg⋅m/s. recall that when a net force acts on an object, the object will accelerate, causing a change in its velocity. hence the object's momentum (p⃗ =mv⃗ ) will also change. the impulse-momentum theorem describes the effect that an impulse has on an object's motion: δp⃗ =j⃗ =f⃗ δt. so the change in momentum of an object equals the net impulse, that is, the net force multiplied by the time over which the force acts. a given change in momentum can result from a large force over a short time or a smaller force over a longer time. now assume that the pitcher in part d throws a 0.145 kg baseball parallel to the ground with a speed of 20.0 m/s in the -x direction. the batter then hits the ball so it goes directly back to the pitcher along the same straight line. what is the ball's x-component of velocity just after leaving the bat if the bat applies an impulse of +6.9n⋅s to the baseball? enter your answer numerically in meters per second using two significant figures.

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What impulse results if the force acting on an object is described by the force-time graph shown?

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