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Assoli18 [71]
3 years ago
5

In 10 seconds, a lion did 150 J of work moving her lion cub up a tree for safety. How much power did she use?

Physics
1 answer:
kvasek [131]3 years ago
7 0

Answer:  

15W is the power used by the lion to take cub up a tree.

<u>Explanation:</u>

In the given question it is said that the total work done by the lion is 150 joules and the required time is 10 seconds. According to mathematical formula of power, Power =\frac{\text {work done}}{\text {time}}  substitute the given terms in the formula = \frac{150}{10} =15 = 15W (Watt is the SI unit of power. Watt is said as one joule per second). The power used by a lion to safe her cub is 15W.

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The coordinate of a particle in meters is given by x(t)=1 6t- 3.0t , where the time tis in seconds. The
Reika [66]

Complete question:

The coordinate of a particle in meters is given by x(t)=1 6t- 3.0t³ , where the time tis in seconds. The

particle is momentarily at rest at t is:

Select one:

a. 9.3s

b. 1.3s

C. 0.75s

d.5.3s

e. 7.3s

​

Answer:

b. 1.3 s

Explanation:

Given;

position of the particle, x(t)=1 6t- 3.0t³

when the particle is at rest, the velocity is zero.

velocity = dx/dt

dx /dt = 16 - 9t²

16 - 9t² = 0

9t² = 16

t² = 16 /9

t = √(16 / 9)

t = 4/3

t = 1.3 s

Therefore, the particle is momentarily at rest at t = 1.3 s

6 0
3 years ago
Force can change the ____________ and _______________ of an object​
slamgirl [31]

Answer:

Force can change the speed and direction of an object.

Explanation:

6 0
3 years ago
Please help on this one?
djyliett [7]
It’s C
Cause Impulse is found by multiplying the force and change in time (which is simply time)
So if you rearrange the equation for time you end up dividing Impulse by force.
3 0
3 years ago
The increases in a planet's speed as it approaches the sun is described by kepler's second law what is the best explanation for
Keith_Richards [23]
<span>Keplers second law, that gravitational potential energy is lost when planets get near the sun and it becomes kinetic energy, best describes the reason why a planets speed will increase as it becomes closer to the sun.</span>
5 0
3 years ago
Two trains leave the station at the same time, one heading east and the other west. the eastbound train travels at 95 miles per
marissa [1.9K]
The east bound train travels at a speed of 95 mile per hour and the west bound train at 75 miles per hour.
Assuming eastbound train will cover distance x then the west bound train will cover distance 272-x .
Therefore, since time taken will be the same then; x/95 = (272-x)/75
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          = 75x = 25840 - 95x
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Thus time taken will either be x/95 or (272-x)/75
           = 152/95
           = 1.6 hours or 1 hour 36 minutes
6 0
3 years ago
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