A 10-kg box, initially at rest, moves along a frictionless horizontal surface. A horizontal force to the right is applied to the box. The magnitude of the force changes as a function of time as shown.
Which of the following impulse calculations is correct?
I. The impulse for the period from 0 to 2 seconds is 4 Ns. II. The impulse for the period from 2 to 5 seconds is 6 Ns. III. The impulse for the period from 5 to 8 seconds is Ns.
I only.
II only.
III only.
I and II.
A 10-kg box, initially at rest, moves along a frictionless horizontal surface. A horizontal force to the right is applied to the box. The magnitude of the force changes as a function of time is shown in the top graph. A student draws the bottom graph for the momentum of this 10-kg box as a function of time during this 10-second interval. Which statements describe what is correct about the second graph and/or describe changes that could be made to correct the graph? Select two answers.
From 0 – 2 seconds, the graph should be curved upward and from 5 – 8 seconds, the graph should be curved downward.
From 0 – 2 seconds, the graph should be curved downward and from 5 – 8 seconds, the graph should be curved upward.
The graph is correct between 0 – 2 seconds and 5 – 8 seconds.
The graph is correct between 2 – 5 seconds and 8 – 10 seconds.
Rank the impulse (greatest to least) applied to the box by this force during each 2-second interval indicated below: a. 0 to 2 s
b. 2 to 4 s
c. 4 to 6 s
d. 6 to 8 s
e. 8 to 10 s
b > c > d > a > e
b > c > a > d > e
b > a > c > d > e
Each slope is straight so the impulse applied to the box during each of the intervals is zero.
A 6 kg sphere collides with a stationary 30 kg sphere on a frictionless and horizontal surface at t = 0 s as shown below. A plot of the force exerted on the 30 kg sphere by the 6 kg sphere as a function of time is also shown.
What is the impulse applied to the 30 kg sphere?
100 kg m/s
250 kg m/s
300 kg m/s
500 kg m/s
For the collision shown ahttps://www.goconqr.com/assets/icons/image-plus-md.pngt the left, the impulse on the 6 kg sphere is:
the same magnitude, but opposite in direction compared to the impulse on the 30 kg sphere.
the same magnitude and direction compared to the impulse on the 30 kg sphere.
five times the magnitude, but opposite in direction compared to the impulse on the 30 kg sphere.
zero.
For the collision shown, what is the speed of the 30 kg sphere immediately after the collision?
0 m/s
10 m/s
50 m/s
100 m/s
For the collision , how do the magnitudes of change in momentum and change in velocity compare for the two objects?
The 6 kg object has a greater magnitude of momentum change and a greater magnitude of velocity change.
The two objects have the same magnitude of momentum change, and the 30 kg object has greater magnitude of velocity change.
The two objects have the same magnitude of momentum change, and the same magnitude of velocity change.
The two objects have the same magnitude of momentum change, and the 6 kg object has greater magnitude of velocity change.
Bitte warte - es wird geladen…