A Moving Particle Is Subject to Conservative Forces Only.
A moving particle is subject to conservative forces only.When its kinetic energy decreases by 10 J,what happens to its mechanical energy?
A)It increases by 10 J.
B)It decreases by 10 J.
C)It increases,but not necessarily by 10 J.
D)It decreases,but not necessarily by 10 J.
E)It remains the same.
A conservative force on a particle moving along the x axis is given by .Which of the following is a potential that is associated with this force?
E)No answer given above is correct.
The force a spring exerts on a body is a conservative force because
A)a spring always exerts a force opposite to the displacement of the body.
B)a spring always exerts a force parallel to the displacement of the body.
C)the work a spring does on a body is equal for compressions and extensions of equal magnitude.
D)the work a spring does on a body is equal and opposite for compressions and extensions of equal magnitude.
E)the net work a spring does on a body is zero when the body returns to its initial position.
Which of the following is a conservative force? (All refer to a car on a slope. )
A)The force you exert on the car pushing it uphill.
B)The force exerted by rain drops falling on the car.
C)The frictional force of the road on the car.
D)The gravitational force acting on the car.
E)The force you exert on the car (pushing it uphill)after it starts to slide downhill.