Question

Okay so I have a few questions:

1. An individual has a weight of 735 Newton’s. What is the individual’s mass? Show the appropriate equation and show your work

2. A temperature of a 50kg block increases by 15 degrees Celsius when 337,500 J of thermal energy are added to the block. What is the specific heat of the object? Show your work
(What is the block made of?) (is this block a good material for insulators or conductors)

3. Describe how the velocity and acceleration of a skydiver changes as she falls from the plane back to the ground.

Answer 1

1. 735÷9.8= 75 kg The total amount of newton's is 736 now you divide that by the number of Newton's in a kg which is 9.8 so the person weighs 75 kg.
2. I don't know this one, sorry.
3. The velocity and acceleration is very fast first because of gravity but it gets slower due to air resistance.

Answer 2

1.

Answer:

m = 74.9 kg

Step-by-step explanation:

As we know that weight of the object is force due to gravity

Now we know that

`F_g = mg`

`m = (F_g)/(g)`

`m = (735)/(9.81)`

`m = 74.9 kg`

2.

Answer:

`s = 450 J/kg ^oC`

Step-by-step explanation:

Heat added to the system is given as

`Q = ms\Delta T`

so we will have

`337500 = 50 s (15)`

`s = 450 J/kg ^oC`

3.

Answer:

Velocity will increase while acceleration will remain constant

Step-by-step explanation:

When skydiver falls from rest then velocity will increase with time while the acceleration due to gravity will remains constant.

So here we can say that

`a = 9.81 m/s^2`

while velocity will increase while it falls from certain height