The statement by Newton that for every action there is an equal but opposite reaction explains the _______ of law of motion?
What is the Third?
100
The energy form associated with an object in motion.
What is kinetic energy?
100
_______ are the units for a spring constant
What is N/m?
100
_________ are the SI units for momentum.
What is kg*m/s?
200
A newton is equivalent to _______ (units)
What is kg·m/s^2?
200
The sign of work is negative, the displacement is in the direction _____________.
What is opposite the force.
200
______ is the energy form that is associated with an object due to its position
What is potential energy?
200
When work is done, the displacement ______ zero
What is- is not?
200
______ is the equation that can be used to directly calculate an object’s momentum, p
What is p=mv?
300
_____ causes a moving object to change direction.
What is Force?
300
A hammer drives a nail into a piece of wood. Identify an action-reaction pair in this situation.
What is the hammer exerts a force on the nail; the nail exerts a force on the hammer?
300
______ is the kinetic energy of a 0.135 kg baseball thrown at 40.0 m/s.
What is 108 J?
300
A child moving at constant velocity carries a 2 N ice-cream cone 1 m across a level surface. ______ is net work done on the ice-cream cone?
What is 0J?
300
A rubber ball moving at a speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s. The magnitude of the momentum of the rubber ball
What is remained the same?
400
Represents the length of a force vector.
What is magnitude of the force?
400
A construction worker pushes a wheelbarrow 5.0 m with a horizontal force of 50.0 N. The amount work done by the worker on the wheelbarrow is _____.
What is 250 J
400
________ is the equation used to expresses the work-kinetic energy theorem
What is work is equivalent to the change in kinetic energy?
400
A more powerful motor can do ________________.
What is the same work in a shorter time interval?
400
The change in an object’s momentum is equal to
What is the product of the force applied to the object and the time interval?
500
A net force of 6.8 N accelerates a 31 kg scooter across a level parking lot. What is the magnitude of the scooter’s acceleration?
What is 0.22 m/s^2?
500
________ is the formula that would be used to directly calculate the kinetic energy of an object with mass bouncing up and down on a spring with spring constant.
What is KE=1/2mv^2?
500
________ is the rate at which work is done.
What is power?
500
_____ is the average power supplied by a 60.0 kg person running up a flight of stairs a vertical distance of 4.0 m in 4.2 s.
What is 560 W?
500
Two swimmers relax close together on air mattresses in a pool. One swimmer’s mass is 48 kg, and the other’s mass is 55 kg. If the swimmers push away from each other, their momenta are ______________.