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4 years ago

Explain newton 2nd law ???

Physics

1 answer:

shusha [124]4 years ago

7 0

Explanation:

Newton's second law simply says that the net force on an object is equal to the object's mass times its acceleration.

∑F = ma

For example, think of a game of tug-of-war, in which two teams pull on a rope in opposite directions.

If the forces are equal (balanced), then the net force is 0 N, so Newton's second law tells us that the rope's acceleration is 0 m/s².

If the forces are not equal (unbalanced), then the net force is not 0 N, and the rope will accelerate in the direction of the net force.

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1. A wheel has a radius of 4.1 m. How far (path length) does a point on the wheel travel if the wheel is rotated through angles

Olin [163]

Answer:

a) 2.15 m

b) 123 m

c) 772.8 m

Explanation:

Circular Motion

One point located at a distance r from the center of rotation travels a distance L given by the arc length :

$L= \theta r$

Where $\theta$ is the angle formed during the rotation.

The wheel described in the question has a radius r=4.1 m and a point on the wheel rotates some angles given in each part:

a) $\theta=30^o=30\cdot \pi / 180=\pi/6 \ rad$

Calculating L

$L= \pi/6 \cdot 4.1=2.15 \ m$

b) $\theta=30\ rad$

$L= 30 \cdot 4.1=123 \ m$

c) $\theta = 30\ revolutions = 30\cdot 2\pi\ rad=60\pi \ rad$

$L= 60\pi \cdot 4.1=772.8 \ m$

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3 years ago

Who has the primary responsibility to prepare for emergencies?

Zolol [24]

Answer:

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3 years ago

A motorist runs out of gas on a level road 230m from a gas station. The driver pushes the 1140kg car to the gas station. If a 14

malfutka [58]

Answer:

The work done is $32.2kJ$

Explanation:

Work is defined as the product of force and distance moved in the direction of application of force.

$W= F*S$

Given Data

distance S= 230m

force F= 140 N

Mass of car m= 1140 kg

Applying the formula for work done we have

$W= 140*230\\W= 32200 J\\W= 32.2kJ$

The work done by pushing the car for a distance of $230m$ is $32.2kJ$

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3 years ago

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trapecia [35]

The sun and heat lamp I think I could be wrong

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4 years ago

Read 2 more answers

Which formula describes acceleration? m/s^2 m/s s/m m2

Aleks04 [339]

Answer:

m/s^2

Explanation:

Force = mass × acceleration

kgm/s^2 = kg × acceleration

where acceleration = Force ÷ mass

= kg m/s^2 ÷ kg

:Acceleration = m/s^2

3 0

4 years ago

Explain newton 2nd law ???​

Explain newton 2nd law ???