2 square root x_a make x the subject of the formular
Answers
Answer:
Given
Mass = 20 kg
Kinetic Energy = 1000 J
To Find
Velocity
Solution
We know that
\sf \longrightarrow KE=\dfrac{1}{2}mv^{2}⟶KE=
2
1
mv
2
Here
KE = Kinetic Energy
m = Mass
v = Velocity
Units
KE = Joule (J)
m = kilogram (kg)
v = metre/second (m/s)
According to the question
We are asked to find velocity
Therefore
\sf \longrightarrow v=\sqrt{\dfrac{2KE}{m}}⟶v=
m
2KE
Given that
Mass = 20 kg
Kinetic Energy = 1000 J
Hence
m = 20 kg
KE = 1000 J
Substituting the values
We get
\sf \longrightarrow v=\sqrt{\dfrac{2 \times 1000}{20}} \ m/s⟶v=
20
2×1000
m/s
\sf \longrightarrow v=\sqrt{\dfrac{2000}{20}} \ m/s⟶v=
20
2000
m/s
\sf \longrightarrow v=\sqrt{\dfrac{200}{2}} \ m/s⟶v=
2
200
m/s
\sf \longrightarrow v=\sqrt{100} \ m/s⟶v=
100
m/s
Therefore
\sf \longrightarrow v=10 \ m/s⟶v=10 m/s
Answer:
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