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WorksheetsMomentum, Impulse, Collisions, Work, Energy and Power
Total questions: 20
Worksheet time: 15mins
Which of the following quantities is most commonly used in sports?
force
impulse
momentum
velocity
What can be concluded of an object whose mass stays constant but its momentum is changing?
Its velocity is changing.
There is no velocity at all.
Its acceleration is changing.
There is no force acting on it.
Jane, a skater who is moving at high speed needs a certain amount of force to stop her. When will more stopping force be needed with?
less mass
less momentum
less velocity
less stopping time
When two stationary objects are suddenly pushed by a spring between them, what happens to the total momentum of the system? Assume that no friction acts on the two objects.
decreases
increases
remains the same
increases then decreases
The impulse experienced by an object is equivalent to its change in _______________.
displacement
kinetic energy
momentum
velocity
A moving car hits an identical car at rest and move together afterwards. What can be concluded about the velocity of the first car before the collision as compared to the velocity of the combined cars after the collision?
larger
smaller
the same
zero
Which of the following quantities is/are conserved during perfectly inelastic collision?
kinetic energy
momentum
Both A and B
Neither A nor B
Which of the following would NEVER happen in a perfectly inelastic collision?
objects move in opposite directions
objects stick together after collision
objects are deformed to some degree
objects move with a common velocity
Two billiard balls, each moving at 1 m/s, roll toward each other and collide. Suppose after bouncing apart, each moves at 2 m/s. The collision violates the conservation of _______________.
momentum
kinetic energy
both of these
none of these
Which of the following quantities is/are conserved during elastic collision?
kinetic energy
momentum
both of these
none of these
When do we say that work is done on an object?
There must be a force acting on the object.
There must be an energy transferred on the object.
The force acting is parallel to the object’s displacement.
The force acting is perpendicular to the object’s displacement.
Which of the following situations shows that work is done on an object or a person?
A big box is dragged across the floor.
A stone is whirled around a horizontal circle.
A stack of books is carried across a room.
A mother is dancing with her baby in her arms.
Nearing the end of the shockwave ride, a braking system exerts an applied force upon the coaster car to bring it to a stop. Determine the type of work done of the applied force?
Maximum Work
Negative Work
Positive Work
Zero Work
The unit of work, joule, is dimensionally the same as __________.
newton/second
newton-second
newton/kilogram
newton-meter
What type of product takes place when two vector quantities are multiplied which results to a scalar quantity like work?
cross product
curl product
dot product
gradient product
Which of the following quantities is multiplied to force which results to the work done?
accelaration
displacement
distance
velocity
Which of the following situations is the work done relates to the elastic potential energy of an object to the configuration of the system?
a child riding a bicycle on the street
a student walking up a flight of stairs
a teacher opening the door of the classroom
a vendor using the weighing scale in selling goods
As an object is lowered into a deep hole in the surface of the Earth, which of the following must be assumed with regard to its potential energy?
It increases.
It decreases.
It remains constant.
One cannot tell.
Conservation of mechanical energy in an isolated system is only subject to conservative forces. Which of the following is an example of a conservative force?
Air Resistance
Friction
Gravity
Tension
Which of the following statements explains the properties and effects of conservative forces? Conservative forces would _________________________.
result in work that are path dependent
result in work that are path independent
lead to work that do not conserve energy
mean the initial and final energies are not the same
