Mechanical Advantage and Efficiency

Boost physics skills with mechanical advantage & efficiency practice problems. Solve for force and work! #physics #simplemachines

Mechanical Advantage and Efficiency Read the word problem and solve using the following equations. Match the correct answer with the word problem. Mechanical Advantage= Force Output InputMA=F(output) F(input)=F(Output) F(output)=F(input)*MA A force of 30 N is applied to a screwdriver to pry the lid off of a can of paint. The screwdriver applies 75 N of force to the lid. What is the mechanical advantage of the screwdriver? 2.5 A lever is used to lift a heavy rock. The mechanical advantage of the lever is 4 and the lever applies a force of 800 N to the rock. What is the force applied to the lever? 200 N To open a soda bottle, a force of 55 N is applied to the bottle opener. If the bottle opener applies a force of 675 N to the cap, what is the mechanical advantage of the bottle opener? 12.3 A lever is designed to have a mechanical advantage of 6. If the lever applies a force of 1800 N to an object, how much force is applied to the lever? 300 N A force of 75 N is applied to a nutcracker to crack open a walnut. If the mechanical advantage of the nutcracker is 3.5, what is the force the nutcracker applies to the walnut? 262.5 N When using a pulley with a mechanical advantage of 1.5, a worker applies 250 N to the pulley. The pulley is used to lift a heavy crate. How much force does the pulley apply to the crate? 375 N A nutcracker is used to crack open a crab leg. 15 N of force is applied to the nutcracker and the nutcracker applies 50 N of force to the crab leg. What is the mechanical advantage of the nutcracker? 3.3 Mechanical Efficiency Read the word problem and solve using the following equations. Match the correct answer with the word problem.Mechanical Efficiency= (Work Output Input) *100% A stage crew member uses a pulley system to lift scenery for the school play. If he does 750 J of work and the pulley system does 600 J of work, what is the efficiency of the pulley system? 80 % To pull a nail out of a wood board a carpenter does 1000 J of work. The hammer he uses does 835 J of work. What is the efficiency of the hammer? 83.5% A ramp is used to load furniture onto a moving truck. The person does 1240 J of work pushing the furniture up the ramp, and the ramp does 822 J of work. Calculate the efficiency of the ramp. 66% A lever does 765 J of work and the person using the lever applies 890 J of work. What is the efficiency of the lever? 86%