Question

Q|C GP Review. There are (one can say) three coequal theories of motion for a single particle: Newton's second law, stating that the total force on the particle causes its acceleration; the work-kinetic energy theorem, stating that the total work on the particle causes its change in kinetic energy; and the impulse-momentum theorem, stating that the total impulse on the particle causes its change in momentum. In this problem, you compare predictions of the three theories in one particular case. A 3.00-kg object has velocity 7.00 j m/s. Then, a constant net force 12.0 i N acts on the object for 5.00s. (a) Calculate the object's final velocity, using the impulse-momentum theorem.

Answer 1

The object's final velocity, using the impulse-momentum theorem, is 20 i +7 j.

What is kinetic energy?

• A particle or an item that is in motion has a sort of energy called kinetic energy. An item accumulates kinetic energy when work, which involves the transfer of energy, is done on it by exerting a net force.
• Kinetic energy comes in five forms: radiant, thermal, acoustic, electrical, and mechanical.
• The energy of a body in motion, or kinetic energy (KE), is essentially the energy of all moving objects. Along with potential energy, which is the stored energy present in objects at rest, it is one of the two primary types of energy.
• Explain that a moving object's mass and speed are two factors that impact the amount of kinetic energy it will possess.

Calculate the object's final velocity using the impulse-momentum theorem.

mass of object m = 3 kg

Initial velocity u = 7 j

net force F = 12 i

Time t = 5 s

(1). Impulse J=F t

                 = 12 i x 5

                 = 60 Ns i

We know  J = m( v-u)

           v- u = J / m

                 = 60 i / 3

                 = 20 i

             v = 20 i + u

               = 20 i +7 j

The object's final velocity, using the impulse-momentum theorem, is 20 i +7 j.

To learn more about kinetic energy, refer to:

brainly.com/question/25959744

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