Newton's First Law Quiz

1. A hockey puck siding at constant velocity across the ice is

in equilibrum

The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity

is in 10 N

If gravity between the Sun and Earth suddenly vanished, Earth would continue moving in

a straight line

 A sheet of paper can be quickly jerked beneath a container of milk without toppling, which best demonstrates

inertia

Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to

follow a straight line path

When you flick a card from beneath a coin that hardly moves, you're illustrating

inertia

When no forces act on moving objects their paths are normally

a straight line

A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is

0

The net force acting on an insect falling downward at constant velocity is

zero

 The support force on a 10-N book at rest on a table is

10 N

 A force is a vector quantity because it has both

magnitude and direction

Which concept is being illustrated when a tablecloth is quickly yanked beneath dishes resting on a table?

inertia

The amount of force needed to sustain motion of a rock in outer space is

zero

 Burl and Paul paint signs together on a scaffold. Compared to their weights plus the weight of the scaffold, the sum of tensions in the supporting ropes is

equal

The net force on any object in equilibrium is

zero

The minimum number of forces that act on a book resting on a table is

two