Which of live following relationship is correct? m = F/a F = m/a a = m/F D none

Question

Which of live following relationship is correct? m = F/a F = m/a a = m/F D none of I he above A SOON gymnast performing a giant swing with an angular velocity of 5 rad/sec. exerts 90 Nm of torque on the support bar How much torque it exerted by the bar on the gymnast's hands? A. 100 Nm 2500 Nm 590 Nm 90 Nm The higher the jump. the "harder" the landing. This statement reflects which of the following laws? A. the law of inertia the law of momentum the law of torque the law of action-reaction The 2 variables that determine momentum are A. velocity and time velocity and mass mass and acceleration velocity and acceleration Which of the following correctly describes impact? large force applied over a long period of time large force applied over a short period of lime small force applied over a long period of time small force applied over a short period of time The product of a force and the lime during which it acts defines what? Momentum velocity acceleration impulse The capacity for doing work that a body possesses because of its height or position is called what? potential energy kinetic energy moment of inertia mechanical power Which of the following is a correct unit of mechanical energy? 0Joules Watts kg-m kg/m

Explanation / Answer

1)

according to newtons second law

Net force is equal to mass times the acceleration

F = m*a

m = F/a <<----answer

option A

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2)

90 Nm

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3)

law of action reaction

option D

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4)

momentum = P = m*v

C) mass & velocity
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5)

impulse = F*t

large forces applied over short period of time

option B

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6)

F*t = impulse

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7)

potential energy

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8)

joules

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