All categories

2 years ago

A weight lifter lifts a 1.0 x 102 kg mass 1.5 m in 2.0 s. The power is?

Physics

1 answer:

Serga [27]2 years ago

6 0

Answer:

$\boxed{p = {7.4 \times 10}^{2} W} \to \: option \: c.$

Explanation:

$his \: power \: is \to \\ p = \frac{mgh}{t} \\ p = \frac{1.0 { \times 10}^{2} \times 1.5 \times 9.8}{2.0} \\ p= 735 \\ \boxed{p = {7.4 \times 10}^{2} }$

You might be interested in

Mamie clark was a psychologist who is known for her research on ?

koban [17]

Mamie Phipps Clark is a noted woman psychologist, best known for her research on race, self-esteem, and child development. Her work alongside her husband, Kenneth Clark, was critical in the 1954 Brown vs Board of Education case and she was the first black woman to earn a degree from Columbia University.

4 0

3 years ago

Read 2 more answers

A 52 kg child on a swing is travelling at 6 m/s . What is his gravitational potential energy if he has 1000 J of the mechanical

DiKsa [7]

Answer:

The correct answer is "64 J".

Explanation:

The given values are:

Mass,

m = 52 kg

Velocity,

v = 6 m/s

Mechanical energy,

= 1000 J

Now,

The gravitational potential energy will be:

⇒ $P.E=1000-\frac{1}{2}mv^2$

$=1000-\frac{1}{2}\times 52\times (6)^2$

$=1000-26\times 36$

$=1000-936$

$=64 \ J$

7 0

2 years ago

Can you help me with this paper please I will give you 20 points!

sweet [91]

1) they are attracting because if you look at the arrows they’re all pointing the same way.

2) if the magnet was turned around they would do the opposite and not attract ( this is called repulsion)

3) magnetic pole

4)magnet

5) magnetic force

6) magnetism

Hope this helps

6 0

2 years ago

Read 2 more answers

A ball accelerates uniformly at +4.0 m/s2

kirill115 [55]

Answer:

483883838939384847848484

8 0

2 years ago

Help me pls its for my science class i need to show my work

Lostsunrise [7]

Answer:

P = 5880 J

Explanation:

Given that,

The mass of the block, m = 30 kg

The block is sitting at a height of 20 m.

The block will have gravitational potential energy. The formula for gravitational potential energy is given by :

$P=mgh\\\\=30\times 9.8\times 20\\\\=5880\ J$

So, the required potential energy is equal to 5880 J.

6 0

2 years ago