Calculate the mass of a ball travelling at 2.3 m/s with a kinetic energy store of 2 J.____ kgGive your answer to 2 significant figures.
Question
Calculate the mass of a ball travelling at 2.3 m/s with a kinetic energy store of 2 J.____ kgGive your answer to 2 significant figures.
Solution
The kinetic energy (KE) of an object can be calculated using the formula:
KE = 1/2 * m * v^2
where m is the mass of the object and v is its velocity.
We can rearrange this formula to solve for m:
m = 2KE / v^2
Substituting the given values:
m = 2*2 J / (2.3 m/s)^2 m = 4 J / 5.29 (m^2/s^2) m = 0.756 kg
Rounded to two significant figures, the mass of the ball is 0.76 kg.
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