Assesmen 1 Energy, Work and Simple machine

 

Practice: Work, Energy & Simple Machines

Fill your name & class, answer all questions, then click Submit & Score. Use the copy button to paste your result into the comment box on the blog.

1) Work is done when a force causes a _______ of an object.

acceleration displacement rotation vibration

2) The SI unit of energy is the _______.

calorie joule watt newton

3) Kinetic energy depends on which two quantities?

mass and velocity force and distance time and speed mass and height

4) Potential energy of an object near Earth’s surface is given by _______.

m v^2 / 2 m g h F / d p v

5) The law that states energy cannot be created or destroyed is called _______.

Law of Inertia Law of Gravity Conservation of Energy Conservation of Mass

6) Which simple machine consists of a wheel attached to a smaller axle and reduces effort?

Inclined plane Gear Wheel and axle Wedge

7) A fixed pulley primarily _______ the direction of the force.

increases decreases changes removes

8) Mechanical advantage (MA) of an inclined plane equals:

height / length length / height effort / load load / effort

9) Which is a second-class lever example?

Seesaw Tweezers Wheelbarrow Fishing rod

10) If you apply force but the object does not move, how much work is done?

Positive work Negative work Zero work Infinite work

After copying the result, paste it manually into your blog's comment box.