Ask question

Ask question

All categories

3 years ago

7

A lever is used to lift a heavy rock. The rock has a mass of 800 N. It requires 200 N of force to lift the rock using the lever.

What is the MA of the lever?

1 answer:

inna [77]3 years ago

5 0

Answer:

The answer for this solution is 4

Explanation:

MA=L/E

800/200

=4

You might be interested in

A 200.0 kg piano is elevated by a crane to a height of 10.0 meters above a sidewalk. If the rope holding the piano breaks, what

Nitella [24]

All that business about the crane and the rope and the falling
is only there to confuse us.

The piano ended up 5 meters above the ground.

   Potential energy = (mass) (gravity) (height)

   = (200 kg) (9.81 m/s²) (5 m)

   = (200 · 9.81 · 5) (kg-m²/s²)

   = 9,810 joules .

5 0

3 years ago

elements found in the same ______ have similar chemical properties. What should go in the blank? Row or column?

Temka [501]

The answer is Column, however if you want to know the scientific word for it, it is also known as a group

(extra fact, a row is called a period)

3 0

3 years ago

When you drive a car around a curve that is not banked, what force provides the centripetal acceleration? HINT: Think about turn

algol [13]

The centripetal force is provided by the friction between the tyres and the ground. That's why a car will slip on ice, because there is less friction.

3 0

3 years ago

Read 2 more answers

A 73-kg boy is surfing and catches a wave which gives him an initial speed of 1.6 m/s. He then drops through a height of 1.60 m,

Gnesinka [82]

To solve this problem it is necessary to apply the concepts related to the Conservation of Energy, for which it is necessary that any decrease made through the potential energy, is equivalent to the gain given in the kinetic energy or vice versa.

Mathematically this can be expressed as

$KE_i+PE_i = KE_f+PE_f$

Since there is no final potential energy (the height is zero), and the initial potential energy is equivalent to the work done we have to

$W = KE_f-KE_i-PE_i$

$W = \frac{1}{2}mv_f^2-\frac{1}{2}mv_i^2 -mgh$

$W =\frac{1}{2} m(v_f^2-v_i^2)-mgh$

$W= \frac{1}{2}(73)(8.5^2-1.6^2)-(73*9.8*1.6)$

$W= 1399.045J$

$W= 1.4kJ$

Therefore the non-conservative work was done on the boy is 1.4kJ

4 0

3 years ago

Which direction will thermal energy flow if you pick up a snowball with your bare hand?

ryzh [129]

When we pick snowball from our bare hand then thermal energy (heat) will flow from our hand to snow. It is because heat always flows from Hot body to Cold body.

Hope this helps!

3 0

3 years ago

Read 2 more answers