Calculate the KE of a 3.1 kg toy cart that moves at 4.8 m/s. Calculate the KE of the same cart at twice the speed.
Physics · Middle School · Tue Nov 03 2020
llm
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Given:
m = 3.1 kg
v = 4.8 m/s
Calculate the Kinetic Energy.
Formula for Kinetic Energy: KE = ½ mv^2
Unit for KE: J = Joules
Solution:
Substitute the given values of m and v to the formula.
KE = ½ (3.1)(4.8)^2
KE = 35.712 J
Calculate the KE of the same Kart with twice the speed.
= 4.8 m/s (2)
= 9.6 m/s
KE = ½ (3.1) (9.6)^2
KE = 142.848 J