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3 years ago

If a boy with 50kg run in 3m/s what is his velocity

Physics

2 answers:

Thepotemich [5.8K]3 years ago

7 0

need to know direction. mag of vel = speed = 3m/s

stepladder [879]3 years ago

6 0

His velocity is 3 m/s in the direction in which he is running in. which.

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Ask Your Teacher Cam Newton of the Carolina Panthers throws a perfect football spiral at 6.9 rev/s. The radius of a pro football

faltersainse [42]

Answer:

$a=159.32\ m/s^2$

Explanation:

It is given that,

Angular speed of the football spiral, $\omega=6.9\ rev/s=43.35\ rad/s$

Radius of a pro football, r = 8.5 cm = 0.085 m

The velocity is given by :

$v=r\omega$

$v=0.085\times 43.35$

v = 3.68 m/s

The centripetal acceleration is given by :

$a=\dfrac{v^2}{r}$

$a=\dfrac{(3.68)^2}{0.085}$

$a=159.32\ m/s^2$

So, the centripetal acceleration of the laces on the football is $159.32\ m/s^2$ . Hence, this is the required solution.

6 0

3 years ago

a ball is launched from the ground with a velocity of 60 m/s at an angle of 34 degrees to the horizontal. what is the final vert

sineoko [7]

Answer:

vertical velocity = 33.55 m/s

Explanation:

sin (34) = v/60

sin (34) x 60 = v

33.55 m/s = v

3 0

3 years ago

The weakest of the four fundamental forces is

drek231 [11]

Answer:

gravity

Explanation:

Though gravity holds planets, stars, solar systems and even galaxies together, it turns out to be the weakest of the fundamental forces, especially at the molecular and atomic scales.

3 0

2 years ago

The average density of the body of a fish is 1080kg/m^3 . To keep from sinking, the fish increases its volume by inflating an in

MArishka [77]

Answer:

Increase of volume (F) = 8.01%

Explanation:

Given:

Density of fish = 1,080 kg/m³

Density of water = 1,000 kg/m³

density of air = 1.28 kg/m³

Find:

Increase of volume (F)

Computation:

1,080 kg/m³ + [F × 1.28 kg/m³ ] = (1+F) × 1,000 kg/m³

1,080 + 1.28 F =1,000 F + 1,000

80 = 998.72 F

F = 0.0801 (Approx)

F = 8.01% (Approx)

7 0

3 years ago

Martha is late for class, so she races her 75 kg body up a 4.0 meter flight of stairs in only 2.3 seconds. What is Martha’s powe

Tema [17]

Martha's power is 1,300 W and is denoted as option A.

<h3>What is Power?</h3>

This is defined as the amount of energy used or transferred per unit time and the S.I unit is Watts.

Power = Work/ time

Work = force × distance

= F = ma = 75kg× 10m/s² = 750N

Work = 750N × 4m = 3000J

Power = work/time = 3000J/ 2.3s ≈ 1300W

Read more about Power here brainly.com/question/1634438

#SPJ1

3 0

2 years ago