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2 years ago

12

What does it mean for forces to be in equilibrium?.

1 answer:

lapo4ka [179]2 years ago

8 0

Explanation:

If the size and direction of the forces on the object are exactly balanced , then there is no net force acting on the object

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Assume that a person bouncing a ball represents a closed system. Which statement best describes how the amounts of the ball's po

Zinaida [17]

Answer:

C.

Explanation:

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2 years ago

What impulse occurs when an average force of 7.0 N is exerted on a cart for 2.5 s ?

makkiz [27]

Answer: $1.7\times 10$

Explanation:

Given

Force $F=7 N$

time interval $t=2.5 s$

Impulse is given by $=Force \times time\ interval\ for\ applied\ force$

$Impulse=7\times 2.5=17.5$

For two significant Figure

$Impulse=1.7\times 10$

7 0

2 years ago

At what rate must a cylindrical spaceship rotate if occupants are to experience simulated gravity of 0.50 gg? Assume the spacesh

Svetradugi [14.3K]

Answer:

The time needed is $T = 16.8 s$

Explanation:

From the question we are told that

The magnitude of the stimulated acceleration due gravity is $a = 0.5 g$

The diameter of the spaceship is $d = 35m$

Generally the force acting on the spaceship is

$F = ma$

Given that the spaceship is rotating it implies that the force experienced by the occupant is a centripetal force so

$F = \frac{mv^2}{r}$

Thus

$ma = \frac{mv^2}{r}$

=> $\frac{v^2}{r} = a$

Generally the speed of this spaceship is mathematically represented as

$v = \frac{2 \pi}{T}$

=> $v^2 = [\frac{2\pi}{T}] ^2$

=> $\frac{\frac{4\pi^2 r^2}{T^2} }{r} = 0.5g$

=> $\frac{4 \pi^2 r }{T^2} = 0.5 g$

=> $T = \sqrt{ \frac{4\pi^2 r}{0.5g}}$

substituting values

$T = \sqrt{ \frac{4* (3.142)^2 *(35)}{0.5 * 9.8}}$

$T = 16.8 s$

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2 years ago

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The energy processed and used by living beings is <br>

Molodets [167]

Answer:

Nutrition , heat , wind

Explanation:

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2 years ago

Light striking a mirror at a 50° angle will be reflected at an angle _____.

Stells [14]

Equal to 50

law of reflection: angle of incidence equals angle of reflection

5 0

3 years ago

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