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Slav-nsk [51]
3 years ago
5

I need somebody to help explain how Newton’s first law is effecting a tennis racket

Physics
1 answer:
Talja [164]3 years ago
3 0
In this case the racket is the unbalanced force which acts upon the object in motion which is the birdie or however you call it
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What is the speed of an object at rest
sammy [17]
The speed of an object is measured by calculating the distance it travels per unit time.
The formula in Physics for calculating speed is = distance/ time.

Since an object at rest is not covering any distance, the speed is always assumed to be 0 m/s.
4 0
3 years ago
A 60 cm diameter wheel accelerates from rest at a rate of 7 rad/s2. After the wheel has undergone 14 rotations, what is the radi
Mamont248 [21]

Answer:

a=368.97\ m/s^2

Explanation:

Given that,

Initial angular velocity, \omega=0

Acceleration of the wheel, \alpha =7\ rad/s^2

Rotation, \theta=14\ rotation=14\times 2\pi =87.96\ rad

Let t is the time. Using second equation of kinematics can be calculated using time.

\theta=\omega_it+\dfrac{1}{2}\alpha t^2\\\\t=\sqrt{\dfrac{2\theta}{\alpha }} \\\\t=\sqrt{\dfrac{2\times 87.96}{7}} \\\\t=5.01\ s

Let \omega_f is the final angular velocity and a is the radial component of acceleration.

\omega_f=\omega_i+\alpha t\\\\\omega_f=0+7\times 5.01\\\\\omega_f=35.07\ rad/s

Radial component of acceleration,

a=\omega_f^2r\\\\a=(35.07)^2\times 0.3\\\\a=368.97\ m/s^2

So, the required acceleration on the edge of the wheel is 368.97\ m/s^2.

6 0
4 years ago
A woman standing on the ground sees a rocket ship move past her at 95% the speed of light. Compared to the rocket at rest, the w
Rufina [12.5K]

As per Einstein's theory of relativity we know that when an object will move with the speed comparable to the speed of light then the length of the object will be different from its length at rest position

This is also known as length contraction theory

As we know here that

L = L_0\sqrt{1 - \frac{v^2}{c^2}}

so here we know that

v = 0.95 c

so from above equation we will have

L = L_0\sqrt{1 - 0.95^2}

L = 0.31 L_0

so here the length will be SHORTER

8 0
3 years ago
20pts<br> Physics wave. <br> Plz answer with explanation there are total 4 question
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Answer:

where are the questions?

8 0
3 years ago
A car has a mass of 1,200 kg. What is its acceleration when the engine exerts a force of 600 N? (Formula: F=ma)
Rasek [7]

Answer:

Option (a)

Explanation:

Given that,

Mass of a car, m = 1200 kg

Force exerted by the engine, F = 600 N

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a is the acceleration of the engine

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So, the acceleration of the car is 0.5 m/s².

6 0
3 years ago
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