Solve this: Q 47 A ball of mass 200 g is thrown vertically upward with a - Science - Work and Energy

Question

Solve this:

Q 47 A ball of mass 200 g is thrown vertically upward with a
velocity of 30 m/s What will be its kinetic energy after 5
second?
(1) 20 J
(2) 40 J
(3) 160 J
(4) 80 J

Anshu Agrawal · Accepted Answer

Dear student,

velocity after 5 sec will be,v=u-gtv=30-10×5v=-20m/s( as the ball is moving vertically upwards)Kinetic energy= 12mv2=12200×10-3×(20)2=40J

Correct answer is 2

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Solve this: Q.47. A ball of mass 200 g is thrown vertically upward with a velocity of 30 m/s. What will be its kinetic energy after 5 second? (1) 20 J (2) 40 J (3) 160 J (4) 80 J

Solve this:

Q.47. A ball of mass 200 g is thrown vertically upward with a velocity of 30 m/s. What will be its kinetic energy after 5 second?
(1) 20 J
(2) 40 J
(3) 160 J
(4) 80 J