PS 14.4 Formative

An inclined plane reduces the effort force by

• increasing the distance over which the force is applied

• increasing the work

• reducing the distance over which the force is applied

• reducing the

  work

An axe is an example of a(n)

• inclined plane

• lever

• wedge

• wheel and axle

Which of the following is an example of a wheel and axle?

• a hammer

• a steering wheel

• a jar lid

• a pencil

The ideal mechanical advantage of a pulley system is equal to

• the distance the load moves

• the length of the rope

• the number of ropes supporting the load

• the weight of the object being lifted

Tags

NGSS.MS-PS2-2

An example of a compound machine is a

• crowbar

• bicycle

• ramp

• seesaw

The ideal mechanical advantage of a wheel and axle is found by

• multiplying the circumference of the wheel by the radius of the axle

• dividing the radius of the wheel by the radius of the axle

• dividing the radius of the axle by the radius of the wheel

• multiplying the radius of the wheel by the radius of the axle

A machine is classified as a compound machine if it

• has moving parts

• has an ideal mechanical advantage greater than 1

• is made up of two or more simple machines that operate together

• is 100% efficient

A(n) (a)   can be described as an inclined plane wrapped around a cylinder.

The fulcrum is always BETWEEN the effort force and the resistance force in a(n) (a)   -class lever.

The ideal mechanical advantage of a third-class lever is always (a)   than 1.