Science prep 1

When a car is at a rest starts moving suddenly the passenger

• Rush backward

• Turn upside down

• Rush forward

• Keep steady

Lubricanting and oiling mechanical machines depend on decreasing the effect of ............ Force

• Inertia

• Friction

• Attraction

• Electromagnetic

The measuring unit of force is ....

• Kg

• Newton

• M/sec

• M

.........Changes the mechanical energy into electric energy

• Dynamo

• Electromagnetic

• Motor

• Electric fan

From application on inertia force

• Safty belts

• Car's break

• Car tire

All of the following forces and operations are applications on fraction except.....

• Walking on ground

• The work in dynamo

• Moving car

• Stopping car

Electromagnetic is used in making

• Electric winch

• Calculator

• Microscope

The objects full down by effect of

• Electromagnetic force

• Gravitational force

• Nuclear force

• Magnetic force

Weak nuclear force are used in producing electric energy

• ✓

• ×

Lubricanting and oiling increase fraction between moving parts

• √

• ×