Forces, Machines, Motion, And Energy Question Preview (ID: 48591)


Exam #1. TEACHERS: click here for quick copy question ID numbers.

A scientist's best guess of why something is happening
a) Observation
b) Law
c) Theory
d) Hypothesis

The straight line change in position of an object
a) Displacement
b) Inertia
c) Velocity
d) Speed

A substance that reduces friction between two moving surfaces.
a) Pressure
b) Fluid
c) Friction
d) Lubricant

Conducted many experiments dealing with the earth's gravitational pull
a) Bernoulli
b) Galileo
c) Newton
d) Einstein

Something that changes the motion and/or shape of an object - can create movement and can also change or stop movement
a) Inertia
b) Heat engine
c) Force
d) Vectors

The upward pushing force of a fluid against an object that is pushing down against the fluid
a) Lubricant
b) Hydrometer
c) Speed
d) Buoyancy

The rate of change of velocity in relation to time
a) Displacement
b) Friction
c) Acceleration
d) Pressure

A force that continually pulls a spinning object toward its center
a) Gravity
b) Centripetal force
c) Acceleration
d) Inertia

An object that orbits another object
a) Solar system
b) Sound wave
c) Satellite
d) Rocket

The study of the mechanics of how fluids flow
a) Energy
b) Fluid dynamics
c) Fusion
d) Induction

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