A body of 25 kg falls from a height of 6 m and comes to rest. Calculate its potential energy (acceleration…

Question

A body of 25 kg falls from a height of 6 m and comes to rest. Calculate its potential energy (acceleration due to gravity = 10m/s²)

ScanSolve AI Tutor · Accepted Answer

Here are the solutions to the questions:

1. (a) Give the S.I. units of the following:

(i) Mass: The S.I. unit of mass is the kilogram.
- $\boxed{\text{Kilogram (kg)}}$
(ii) Power: The S.I. unit of power is the Watt.
- $\boxed{\text{Watt (W)}}$
(iii) Force: The S.I. unit of force is the Newton.
- $\boxed{\text{Newton (N)}}$
(iv) Work: The S.I. unit of work is the Joule.
- $\boxed{\text{Joule (J)}}$

1. (b) List four forms of energy:

1. (c) A body of 25 kg falls from a height of 6 m and comes to rest. Calculate its potential energy (acceleration due to gravity = 10 m/s²):

Identify the given values.
Mass ( $m$ ) = $25 \text{ kg}$
Height ( $h$ ) = $6 \text{ m}$
Acceleration due to gravity ( $g$ ) = $10 \text{ m/s}^2$
State the formula for potential energy.
Potential Energy ( $PE$ ) = $mgh$
Substitute the values into the formula and calculate.
$PE = (25 \text{ kg}) \times (10 \text{ m/s}^2) \times (6 \text{ m})$ $PE = 250 \text{ N} \times 6 \text{ m}$ $PE = 1500 \text{ J}$
The potential energy of the body is $\boxed{\text{1500 J}}$ .

2. (a) Define the following:
- (i) Tissue: A tissue is a group of similar cells that work together to perform a specific function.
- (ii) Organ: An organ is a collection of different tissues grouped together to perform a specialized function.
2. (b) Name two tissues and two organs found in the human body:
- (i) Two tissues:
  
  Muscle tissue
  
  Nervous tissue
- (ii) Two organs:
  
  Heart
  
  Lungs

A body of 25 kg falls from a height of 6 m and comes to rest. Calculate its potential energy (acceleration due to gravity = 10m/s²)