Pick the bigger force multiplier

Exercise and reference answers

Questions

1. A

   Ordinary single pulley

   B

   Pulley with four cables

   Higher value

   Pulley with four cables

2. A

   Wheelbarrow at 1.02 m

   B

   Car axle to road wheel

   Higher value

   Wheelbarrow at 1.02 m

3. A

   Shovel

   B

   Ordinary single pulley

   Higher value

   Ordinary single pulley

4. A

   Pulley with two cables

   B

   Pulley with three cables

   Higher value

   Pulley with three cables

5. A

   Nail puller, long handle

   B

   Back muscle at the spine

   Higher value

   Nail puller, long handle

6. A

   Pulley with four cables

   B

   Wheelbarrow at 1.02 m

   Higher value

   Wheelbarrow at 1.02 m

Instructions

Tap whichever machine has the larger mechanical advantage.

Explanation