physics quiz
A 1-Kg mass at the Earth's surface weighs
10 n
impulse is equal to
A corresponding change in momentum
A constant net force on a rail-road car produces constant
Acceleration
The greater efficiency achieved with the curved blades of a Pelton wheel is due to
Bouncing
An educated scientific guess is a
Hypothesis
Newton's second law directly involves
acceleration
Action and reaction pairs of forces always act on
different bodies
An objects weight is properly expressed in units of
newtons
A given net force propels an object along a straight line path by a force. If the mass were doubled its acceleration would
stay the same
For a scientific hypothesis to be valid, there must be a test for proving it
wrong
The force required to maintain an object at a constant velocity in free space is equal to
zero
The net force on any object in equilibrium is
zero
