Physics, 12.08.2020 23:01 zahradawkins2007

The kinetic energy of an object with a mass of 6.8 kg and a velocity of 5.0 m/s is J. (Report the answer to two significant figures.)

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Answer from: meleajhart

The kinetic energy of the object reported to two significant figures is: 85 Joules.

Given the following data:

Mass = 6.8 kg Velocity = 5.0 m/s.

To find the kinetic energy of the object:

Kinetic energy refers to an energy that is possessed by a physical object or body due to its motion.

Mathematically, kinetic energy is calculated by using the formula;

$K.E = \frac{1}{2} MV^2$

Where:

K.E is the kinetic energy. M is the mass of an object. V is the velocity of an object.

Substituting the parameters into the formula, we have;

$K.E = \frac{1}{2}$ × 6.8 × 5^2

K.E = 3.4 ×

Kinetic energy = 85 Joules.

Therefore, the kinetic energy of the object is 85 Joules.

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Answer from: payshencec21

$\boxed{\sf Kinetic \ energy \ (KE) = 85 \ J}$

Given:

Mass (m) = 6.8 kg

Speed (v) = 5.0 m/s

To Find:

Kinetic energy (KE)

Explanation:

Formula:

$\boxed{ \bold{\sf KE = \frac{1}{2} m {v}^{2} }}$

Substituting values of m & v in the equation:

$\sf \implies KE = \frac{1}{2} \times 6.8 \times {5}^{2}$

$\sf \implies KE = \frac{1}{ \cancel{2}} \times \cancel{2} \times 3.4 \times 25$

$\sf \implies KE =3.4 \times 25$

$\sf \implies KE = 85 \: J$

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Answer from: Quest

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