fj8pt5bkw2 fj8pt5bkw2

22-07-2021
Mathematics

contestada

Tim used a lever to lift a heavy box off the ground. His input work was 50 J and the output work was 40 J. What was the mechanical efficiency of the lever?
A.90%
B.30%
C.80%
D.10%

Respuesta :

22-07-2021

Answer:C

Explanation: 40 divided by 50 is .80
Equaling 80%

Answer Link

Otras preguntas

Find the volume of a sphere with a radius of 8 and round to the nearest hundreth.

Sickle-cell anemia is a recessive trait in humans. In order to express the disease, an affected individual must inherit two recessive alleles (ss). What is the

write the ratio as a fraction in simplest form - 9:24

substances in the ecosystem are recycled by the _________.

5. Why does pumping a soccer ball with an air pump increase the pressure inside the ball? The pump puts more gas particles inside the ball. The pump cools the g

I need help please! I'm stumped and I don't know what to do.

Please need help thank you.

PLEASE HURRY!!! WILL GIVE BRAINLY!!! (Answer choices and question is in the picture)

a bike is moving with a velocity of 90km/hr.after applying break it stops in 5 sec. calculate the force applied by brakes .mass of motercycle and rides is 200

Geometry question, please help!!