Which resource can be used over and over again, hence making them unlimited?
- Non-renewable Sources
- Renewable Sources
- Kinetic Sources
- Electrical Sources
A movable pulley can:
- Increase the input force
- Decrease the input force
- Change the direction of force
- Change the speed of force
Which of the following use movable pulleys?
- Water wells
- Flags
- Bicycles
- Cranes
Which of the following is an example of wheel and axle?
- Car Steering
- Knife
- Seesaw
- Bottle opener
A wheel with pointed edges like teeth are?
- Pulley
- Gear
- Axle
- Sprocket
Gears can do all of the following except?
- Change speed
- Change direction
- Change force
- Change fulcrum
What occurs when light bounces off a shiny surface?
- Refraction
- Diffraction
- Reflection
- Absorption
Light travelling in a straight line ___when it strikes the surface of another medium.
- Reflects
- Refracts
- Diffracts
- Absorbs
A movable pulley is used as:
- Speed multiplier
- Force multiplier
- Direction changer
- Load reducer
Which of the following occurs when light passes through a substance unchanged?
- Transmission
- Reflection
- Absorption
- Refraction