Question

An object moving whit a speed of 35 m/s and has kinetic energy of 1500 j, what is the mass of the object

Answer 1

Answer:

Mass of the object is 2.45 kg

Explanation:

It is given that,

Speed of an object, v = 35 m/s

Kinetic energy, K = 1500 J

We need to find the mass of the object. The kinetic energy of the object is given by :

$K=\dfrac{1}{2}mv^2$

$m=\dfrac{2K}{v^2}$

$m=\dfrac{2\times 1500\ J}{(35\ m/s)^2}$

m = 2.45 Kg

So, the mass of the object is 2.45 kg. Hence, this is the required solution.

Answer 2

The mass of the object is 2.44kg

The calculation can be done as follows;

velocity= 35 m/s

mass= ?

kinetic energy= 1500 joules

k.e= 1/2mv²

1500= 1/2m(35²)

1500= 0.5(1.225)(m)

1500= 6.125m

m= 1500/612.5

= 2.44

Hence the mass of the object is 2.44 kg

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