Physical Science Ch. 10 Test Review

What is the name of the book in which Isaac Newton published the laws of motion and universal gravitation?

The vector representing the change in an object's position is

The SI unit of power is the _____

ma

In physics, any change in speed, direction, or both is ______.

Which of Newton's laws is also called the law of inertia?

for every action there is an equal and opposite reaction

Which of the following is not a form of assistance provided by simple machines?

G\frac{m_1m_2}{d^2}

Physical quantities having both magnitude and direction are _____ quantities.

\frac{d}{t}

What is the SI unit for energy?

Physical quantities having magnitude but not direction are _____ quantities.

How much does a grocery basket weigh if it takes 122.2 N to accelerate it 2.2 m/s²?

\frac{1}{2}gt^2

Which of the following does not affect the force of friction?

Work is only done when an object moves.

What is the SI unit for force?

\frac{v_{f_{ }}-v_i}{t}

fly swatter

Momentum is the same thing as kinetic energy.

The acceleration of gravity at the surface of the earth is ?

Under ideal conditions, a machine's work output is ___ its work input.

lever, screw, inclined plane, wedge, pulley, wheel & axle

the force required to accelerate an project at a certain rate equals the object's mass times the desired acceleration

the velocity of an object does not change unless the object is acted upon by an external force

a pair of scissors

brake pedal of a car

The force applied to an object is ______ proportional to its acceleration.

A 1 kg brick & a 100 kg safe were both dropped from a tall building at the same time. If air resistance is ignored...

The velocity at which the force of air resistance on a falling object equals the object's weight is the ____ velocity.

A car travels 52.5 km east and then travels 31.3 km north, what is the displacement of the car?

What is the average speed of a car that travels 500 km in 10 hr?

The "quantity of motion" of an object, equal to the product of the object's mass and velocity, is _____?

We do not live in an ideal world and so work output is always less than work input mainly due to this one factor.