All categories

3 years ago

What is the formula that can be used to find velocity if kinetic energy and mass are known?

Physics

2 answers:

Temka [501]3 years ago

8 0

Answer:

v = √(KE*2/m)

Explanation:

The formula to compute kinetic energy (KE) is:

KE = 1/2*m*v^2

where m refers to mass and v refers to velocity. Isolating v we get:

KE = 1/2*m*v^2

KE*2/m = v^2

v = √(KE*2/m)

Given kinetic energy and mass, then velocity can be computed.

viva [34]3 years ago

6 0

The formula for kinetic energy is $\frac{1}{2}m\Delta v^2$ . Thus, the equation for velocity is $v= \sqrt{ \frac{2TotalKineticEnergy}{m} }$ .

You might be interested in

Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of

Arlecino [84]

Answer:

$a=242.62\ m/s^2$

Explanation:

The rocket-powered sled is accelerated to a speed of 444 m/s in 1.83 seconds.

We need to find the acceleration of the rocket. Initially it was at rest, u = 0

Acceleration = rate of change of velocity

$a=\dfrac{444\ m/s}{1.83\ s}\\\\a=242.62\ m/s^2$

So, the acceleration of the rocket is $242.62\ m/s^2$ .

3 0

3 years ago

The focus of Lesson 1 is Newton's first law of motion - sometimes referred to as the law of inertia. An object at rest stays at

aleksandr82 [10.1K]

Answer:

acted

Explanation:

Simple Physics question!!!!!

6 0

4 years ago

Read 2 more answers

A motorcycle has a constant speed of 29.6 m/s as it passes over the top of a hill whose radius of curvature is 183 m. The mass o

coldgirl [10]

Answer:

a) centripetal force = m v^2 / R = 329 * (29.6 m/s)^2 / 183

F = 1580 Newtons

b) normal force = gravitational force - F = 329 * 9.8 - 1580 = 1640 N

8 0

2 years ago

The unit of mass"kilogram" is a fundamental unit. why?

EleoNora [17]

Answer:

kilogram is a fundamental unit because it is one of the 7 fundamental units that serve as a building block for derived units.

Explanation:

Fundamental units are used to measure fundamental quantities. They are fundamental units because they serve as a building block for derived units.

7 fundamental quantities and their corresponding units;

Length – meter

Mass – kilogram

Time - seconds

Temperature - Kelvin

Amount of substance - Moles

Electric Current - Ampere

Luminous intensity - Candela

Thus, kilogram is a fundamental unit because it is one of the 7 fundamental units.

5 0

3 years ago

Astone is thrown directly upward with an initial speed of 9.6 m/s from a height of 12.8 m. After what time interval (in s) does

lara31 [8.8K]

Answer:

1.89 seconds

Explanation:

t = Time taken

u = Initial velocity = 9.6 m/s

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

$v=u+at\\\Rightarrow 0=9.6-9.8\times t\\\Rightarrow \frac{-9.6}{-9.8}=t\\\Rightarrow t=0.97 \s$

Time taken to reach maximum height is 0.97 seconds

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=9.6\times 0.97+\frac{1}{2}\times -9.8\times 0.97^2\\\Rightarrow s=4.7\ m$

So, the stone would travel 4.7 m up

So, total height ball would fall is 4.7+12.8 = 17.5 m

$s=ut+\frac{1}{2}at^2\\\Rightarrow 17.5=0t+\frac{1}{2}\times 9.8\times t^2\\\Rightarrow t=\sqrt{\frac{17.5\times 2}{9.8}}\\\Rightarrow t=1.89\ s$

Time taken by the stone to travel 17.5 m is 1.89 seconds

3 0

3 years ago