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rock_star
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change in kinetic energy! Velocity not given :(
Two forces, of magnitudes F1 = 70.0 N and F2 = 35.0N , act in opposite directions on a block, which sits atop a frictionless surface, as shown in the figure. Initially, the center of the block is at position xi = -2.00cm . At some later time, the block has moved to the right, and its center is at a new position, Xf = 4.00 cm .
Determine the change in the kinetic energy of the block as it moves from Xi= -2.00 to X f= 4.00
Link to the diagram : http://session.masteringphysics.com/problemAsset/1011314/13/MWE_wi_5.jpg
Kinetic energy = 1/2 mv^2
Since it is starting from rest, initial velocity, V0 = 0 and then d = Vf t
But here Vf is not given..
I am not sure how to proceed when there is no velocity given
Can any more help me ?
Thanks a lot before hand
Homework Statement
Two forces, of magnitudes F1 = 70.0 N and F2 = 35.0N , act in opposite directions on a block, which sits atop a frictionless surface, as shown in the figure. Initially, the center of the block is at position xi = -2.00cm . At some later time, the block has moved to the right, and its center is at a new position, Xf = 4.00 cm .
Determine the change in the kinetic energy of the block as it moves from Xi= -2.00 to X f= 4.00
Link to the diagram : http://session.masteringphysics.com/problemAsset/1011314/13/MWE_wi_5.jpg
Homework Equations
Kinetic energy = 1/2 mv^2
The Attempt at a Solution
Since it is starting from rest, initial velocity, V0 = 0 and then d = Vf t
But here Vf is not given..
I am not sure how to proceed when there is no velocity given
Can any more help me ?
Thanks a lot before hand
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