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3 years ago

Newton’s second law: Force equals mass times acceleration (=_).

Physics

1 answer:

DIA [1.3K]3 years ago

7 0

F n = ma / unbalanced force - In the direction of the force.

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A long distance runner has an average speed of 4m/s during a race. How far does the runner travel in 20 minutes?

rosijanka [135]

speed = distance/time

distance = speedxtimr

=4x20x60=8x600=4800m

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4 years ago

A diver in the pike position (legs straight, hands on ankles) usually makes only one or one-and-a-half rotations. To make two or

Korolek [52]

Answer:

from the above analysis we can say that the angular velocity in the later case is more than that of the former case. This means that the number of rotation made in the truck case is more than that made in pike position.

Explanation:

This can be explained on the basis of conservation of angular momentum.

This means the initial and the final angular velocity is conserved. Consider initial position (1)in the pike and final position in the be truck position. So there inertia's will also be different.

⇒ $I_1\omega_1 = I_2\omega_2$

$\frac{I_1}{I_2} = \frac{\omega_2}{\omega_1}$

also,

$I_1= mr_1^2$

$I_2= mr_2^2$

since, $r_2^2$

$I_2^2$

therefore,

$\omega_1^2$

So, from the above analysis we can say that the angular velocity in the later case is more than that of the former case. This means that the number of rotation made in the truck case is more than that made in pike position.

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4 years ago

A 2.51 kg ball is attached to a ceiling by a 1.19 m long string. The height of the room is 3.45 m. The acceleration of gravity i

ANTONII [103]

Answer:

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Explanation:

Since the height of the room is 3.45 m (distance between the floor and the ceiling) the difference between this value and the length of the rope 1.19 m; it will be equal to (3.45-1.19) =2.26 m. If we take as a reference point (Ep=0) the floor of the room, then the potential energy will be equal to Ep = M * g * h, replacing values in this equation (2.5 kg * 9.81 m/s2 * 2.26 m) will be 55,42 (N * m) or Jules.

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3 years ago

What is the Asch experiment

Leokris [45]

Answer:

the experiment that Asch was studying was how individuals yielded to or defied a majority of groups and the effect of such influences on beliefs and options

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4 years ago

Find the average velocity of the object from point B to C.

ExtremeBDS [4]

The average velocity of the object in moving from point-B to point-C is

(the straight-line distance and direction from point-B to point-C)
divided by
(the time the object takes to make the trip) .

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3 years ago

Newton’s second law: Force equals mass times acceleration (__=___).

Newton’s second law: Force equals mass times acceleration (=_).