Question

Far in space, where gravity is negligible, a 425 kg rocket traveling at 95 m/s fires its engines. (Figure 1) shows the thrust force as a function of time. The mass lost by the rocket during these 30 s is negligible. What impulse does the engine impart to the rocket? Express your answer in newton-seconds. Figure F (N) 1000 0 0 10 20 30 < 1 of 1 > 1(s) At what time does the rocket reach its maximum speed? Express your answer with the appropriate units. What is the maximum speed of the rocket? Express your answer with the appropriate units.

          Far in space, where gravity is negligible, a 425 kg rocket traveling at
95 m/s fires its engines. (Figure 1) shows the thrust force as a function
of time. The mass lost by the rocket during these 30 s is negligible.
What impulse does the engine impart to the rocket?
Express your answer in newton-seconds.
Figure
F (N)
1000
0
0
10 20
30
< 1 of 1 >
1(s)
At what time does the rocket reach its maximum speed?
Express your answer with the appropriate units.
What is the maximum speed of the rocket?
Express your answer with the appropriate units.

Show more…

Far in space, where gravity is negligible, a 425 kg rocket traveling at
95 m/s fires its engines. (Figure 1) shows the thrust force as a function
of time. The mass lost by the rocket during these 30 s is negligible.
What impulse does the engine impart to the rocket?
Express your answer in newton-seconds.
Figure
F (N)
1000
0
0
10 20
30
< 1 of 1 >
1(s)
At what time does the rocket reach its maximum speed?
Express your answer with the appropriate units.
What is the maximum speed of the rocket?
Express your answer with the appropriate units.

Added by Charles H.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Maardava V

02/17/2022

Step 1

e. the area under the F(t) curve. The graph is a triangle with base 30 s and height 1000 N. Show more…

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Part A Far in space, where gravity is negligible, a 425 kg rocket traveling at 95 m/s fires its engines. Figure shows the thrust force as a function of time. The mass lost by the rocket during these 30s is negligible. What impulse does the engine impart to the rocket? Express your answer in newton-seconds. Part B At what time does the rocket reach its maximum speed? Express your answer with the appropriate units. Part C Figure 1 of 1 What is the maximum speed of the rocket? Express your answer with the appropriate units.

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Transcript

00:01 Hi, in this question it is given that a rocket of mass 485 k k klogram traveling at 95 meters per second in the positive x direction.

00:12 So the mass is given us 485 kg and the speed is given us let us say u is equal to 95 meters per second.

00:28 The time taken, the time duration for losing the mass by the rocket is given us 30 seconds.

00:41 So during this time the rocket is losing the moss.

00:45 And the graph of force and time is given.

00:47 We need to find the impulse exerted by the engine to the rocket, maximum speed, and the time taken to reach the maximum speed.

00:57 So there are three questions here.

00:59 So the pot a, pot b and part c.

01:02 Let us go into the pot a.

01:04 In the pot a, so we need to find the impulse.

01:11 The impulse is nothing but impulse is the product of the force and the time.

01:15 So the area under the graph which is given in the question, we can determine the impulse.

01:24 So we can write impulse is equal to the force multiply with time.

01:34 So this is the area under the graph.

01:37 Area under the graph is 1 by 2bh, base into height.

01:45 Now let us plug the given values from the graph.

01:49 We obtain 1 by 2, basis, 30, and height is 1 ,000.

02:00 On calculation we obtained, the impulses 1 ,500 newton second.

02:11 The impulse is equal to 1 ,500 newton second...

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