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3 years ago

Velocity is a description of an object’s blank

Physics

2 answers:

anzhelika [568]3 years ago

8 0

Velocity is the description of an object's motion from one point to another.

It tells the speed with which the trip is completed, and the direction from the start-point to the end-point. It tells nothing about any twists, turns, loops, bends, or stops along the way.

Alisiya [41]3 years ago

3 0

Change in displacement per unit of time (Ex. 25m/s East)

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What happens to the standing wave frequencies if you quadruple the tension in the string?

kramer

Answer:

. A standing wave on a string (fixed at both ends) has a fundamental frequency f. If you quadruple the tension in the string, how can you change the length of the string so that the fundamental frequency remains the same? ... double the length.

8 0

3 years ago

Describe a situation in which you can accelerate even though your speed doesnt change

Verdich [7]

If you're riding a carousel or around a circular track, you have acceleration.

"Acceleration" means any change in speed or direction of motion. When
you're moving in a circle, the direction of your motion is changing constantly,
so you're constantly accelerating.

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3 years ago

The law of repulsion by Coulomb agrees with: Newton's law of universal gravitation Newton's laws of motion the findings of Gilbe

s344n2d4d5 [400]

Explanation:

The law of repulsion is given by Coulomb. The mathematical form of Coulomb law is given by :

$F=\dfrac{kq_1q_2}{r^2}$ ...............(1)

Where

F is the force

k is the electrostatic constant

$q_1\ and\ q_2$ are electric charges

r is the distance between charges

The Newton's law of universal gravitation is given by :

$F=\dfrac{Gm_1m_2}{r^2}$ ..............(2)

G is the universal gravitational constant

From equation (1) and (2) it is clear that both law obeys inverse square law and both are of same type. So, the law of repulsion by Coulomb agrees with the Newton's law of universal gravitation.

7 0

3 years ago

A ball with the mass of 600kg moves at a speed of 8 m/s legatos force is needed to bring it to a stop at 10 s

lorasvet [3.4K]

Answer:

480N

Explanation:

A ball is moving a speed of 8 there fore it had to be add force opposite direction to the ball if it takes to rest. There for ball is subjected to deceleration. First we can find the deceleration

V = U + at

0 = 8 + a×10

a= 0.8 m /s²

Then we can apply newton's 2nd law to determine the force acted by legatos

F= ma

F= 600×0.8

= 480 N

4 0

3 years ago

BB8 is an intergalactic robot (essentially a soccer ball with a half meter radius that can control how fast it rolls around) tha

hram777 [196]

Answer:

20 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

r = Radius of robot = 0.5 m

$\alpha$ = Angular acceleration = 2 rad/s²

Linear acceleration is given by

$a=r\alpha\\\Rightarrow a=0.5\times 2\\\Rightarrow a=1\ m/s^2$

$s=ut+\frac{1}{2}at^2\\\Rightarrow 50=0t+\frac{1}{2}\times 1\times t^2\\\Rightarrow t=\sqrt{\frac{50\times 2}{1}}\\\Rightarrow t=10\ s$

While speeding up time taken is 10 seconds

$v=u+at\\\Rightarrow v=0+1\times 10\\\Rightarrow v=10\ m/s$

$s=ut+\frac{1}{2}at^2\\\Rightarrow 50=10t-\frac{1}{2}\times 1\times t^2\\\Rightarrow t=\sqrt{\frac{50\times 2}{1}}\\\Rightarrow 50=10t-0.5t^2\\\Rightarrow -5t^2+100t-500=0$

$t=\dfrac{-100\pm \sqrt{100^2-4\left(-5\right)\left(-500\right)}}{2\left(-5\right)}\\\Rightarrow t=10\ s$

The time taken to slow down is 10 seconds

Total time the trial is rum is 10+10 = 20 seconds

6 0

3 years ago