Question

What is the mass of an object that has 324 J of energy and is moving at a speed of 9 m/s?

Answer 1

Explanation:

An object has kinetic energy of 324 J. If its speed is 9m,s, what is its mass? ... A truck moving at 15m//s has KE of 4.2xx10^5 J.

Answer 2

Answer:

The mass of an object that has 324 J of energy and is moving at a speed of 9 m/s is 8 kg.

Explanation:

Given: K= 324J, V= 9m/s

To find:  The mass of an object

Step 1: Consider a point object that is moving inertia with respect to a fixed point (i.e., an inertial reference), such that the object always has a speed of v. Kinetic energy is the energy caused by speed.

Step 2: Here's the information that we need to use:

- K is the kinetic energy ( $324 \mathrm{~J})$

- v is the speed of the object $(9 \mathrm{~m} / \mathrm{s})$

- m is the mass

Step 3: Let's determine the mass from the definition of kinetic energy.

$K=\frac{1}{2} m v^2$

Step 4: Solving for mass:

$\begin{aligned}m & =\frac{2 K}{v^2} \\& =\frac{2(324 \mathrm{~J})}{(9 \mathrm{~m} / \mathrm{s})^2} \times \frac{1 \mathrm{~kg} \mathrm{~m}^2 / \mathrm{s}^2}{1 \mathrm{~J}} \\& =8 \mathrm{~kg}\end{aligned}$

Hence, The mass of an object that has 324 J of energy and is moving at a speed of 9 m/s is 8 kg.

Learn more about similar questions visit:

https://brainly.in/question/5985804?referrer=searchResults

https://brainly.in/question/6715152?referrer=searchResults

#SPJ2