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2 years ago

Which of the following has the greatest momentum?

Physics

1 answer:

Jobisdone [24]2 years ago

4 0

Answer:

Tortoise has the greatest momentum

Explanation:

Momentum of tourtise (p)=mass×velocity

=275×0.55

=151.25 kgm/s

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Help please i will mark brainlist!!

Dmitrij [34]

The answer is A.

p=m/v
p= 240/60
p= 4 g/cm^3

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2 years ago

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You are standing a distance of 17.0 meters from the center of a merry-go-round. The merry-go-round takes 9.50 seconds to go comp

GenaCL600 [577]

Answer:

(a)11.24 m/s

(b)7.44 m/s

(d) $539.55\mu$

(e) 0

Explanation:

The period for 1 circle $2\pi$ of the merry go around is 9.5s. It means the angular speed is:

$\omega = \theta / t = 2\pi / 9.5 \approx 0.661 rad/s$

(a)The speed is

$v = \omega * R = 0.661 * 17 = 11.24 m/s$

(b) Centripetal acceleration:

$a = \frac{v^2}{R} = \frac{11.24^2}{17} = 7.44 m/s^2$

$F = ma = 55 * 7.44 = 409 N$

(d) let the coefficient of friction by $\mu$ . The frictional force shall be this coefficient multiplied by normal force reverting gravity of the man

$F_f = mg\mu = 55*9.81\mu = 539.55\mu$

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2 years ago

18. If the distance from a converging lens to the object is less than the focal length of the lens, the image will be _______ th

skad [1K]

Here's a quick way to find out. Pick up your glasses, bifocals work best, and find the focal length with a flashlight against a book. If I remember right, the object should be magnified and upside down. So, A.

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3 years ago

Our Sun is a_________ star.

aliina [53]

NAMASTE :)

HERE IS YOUR ANSWER:

Our Sun is a $\boxed{high- temperature }$ star.

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2 years ago

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If a football player does 39000 J of work, how much power does the football player exert in 5 minutes

Drupady [299]

Answer:

Power = 130 watt

Explanation:

Power is described as the ability to do work, it is also defined as the amount of work in Joules done in a given time in seconds. Mathematically, it is represented as:

$power = \frac{work (J)}{Time (s)}$

In this example, power is calculated as follows:

Work = 39000 J

Time = 5 minutes

converting the time from minutes to seconds:

1 minute = 60 seconds

∴ 5 minutes = 60 × 5 = 300 seconds

$\therefore power = \frac{39000}{300} \\power = 130 watt$

N:B the unit for power can also be represented as Joules/seconds or J/s or JS⁻¹

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2 years ago