Physics 3

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

10 N

A jumbo jet has a mass of 100,000 kg. The thrust for each of its four engines is 50,000 N. What is the jet's acceleration in meters per second per second when taking off?

2

A car has a mass of 1000 kg and accelerates at 2 meters per second per second. What is the magnitude of the net force exerted on the car?

2000 N

A girl pulls on a 10-kg wagon with a constant horizontal force of 30 N. If there are no other horizontal forces, what is the wagon's acceleration in meters per second per second?

3

An object is pulled northward by a force of 10 N and at the same time another force of 15 N pulls it southward. The magnitude of the resultant force on the object is-

5 N

The mass of a pet turtle that weighs 10 N is-

about 1 kg

A rock is thrown vertically into the air. At the very top of its trajectory the net force on it is-

equal to its weight

The newton is a unit of-

force

An object following a straight-line path at constant speed-

has zero acceleration

If an object's mass is decreasing while a constant force is applied to the object, the acceleration-

increases

If one object has twice as much mass as another object, it also has twice as much-

inertia

Whenever the net force on an object is zero, its acceleration-

is zero

A force is a vector quantity because it has both-

magnitude and direction

A kilogram is a measure of an object's-

mass

Compared to a 1-kg block of solid iron, a 2-kg block of solid iron has twice as much-

mass, inertia, and volume

Your weight is-

the gravitational attraction between you and the earth

A light woman and a heavy man jump from an airplane at the same time and open their same-size parachutes at the same time. Which person will get to a state of zero acceleration first?

the light woman

Compared to the mass of a certain object on Earth, the mass of the same object on the moon is-

the same

An object is propelled along a straight-line path by a force. If the net force were doubled, the object's acceleration would be-

twice as much

When a falling object has reached its terminal velocity, its acceleration is-

zero