Class 5 Science Question Answers - Work, Force, Energy and Simple Machines

Q1: What is needed to make things move?
Ans: Force is essential to make things move. 

Q2: What is the force that attracts objects to the center of the Earth called?
Ans: The force that attracts objects towards the centre of the Earth is called gravity.

Q3: What is the force by which a magnet pushes or pulls iron objects called?
Ans: Magnetism is the force by which a magnet pushes or pulls iron objects.

Q4: When we push or pull something, what type of force are we applying?
Ans: When we push or pull something, we are applying a type of force known as muscular force.

Q5: What is the force that acts between two objects when they are in contact with each other?
Ans: The force that acts between two objects when they are in contact with each other is known as friction.

Q6: What is the ability to do work called?
Ans: Energy is the ability to do work. It is a fundamental concept in physics and is crucial for various processes in nature and technology.

Q7: What type of energy helps us see things?
Ans: Light energy is the type of energy that helps us see things.

Q8: Which source gives us heat and light and is the greatest source of energy on Earth?
Ans: The Sun is the primary source that provides us with both heat and light.

Q9: What type of energy is produced by appliances like fan, computer, and television?
Ans: The type of energy produced by appliances such as a fan, computer, and television is known as electrical energy.

Q10: What type of energy is possessed by an object due to its position or movement?
Ans: Mechanical energy is the type of energy possessed by an object due to its position or motion. 

Q11: What makes our work easier by reducing the force needed?
Ans: Machines make our work easier by significantly reducing the force needed to perform tasks.

Q12: What is a simple tool that makes work easier and faster?
Ans: Simple machines are fundamental tools that make work easier and faster.

Q13: What type of lever has the fulcrum between the load and effort?
Ans: A Class 1 lever is a type of lever where the fulcrum is positioned between the load and the effort. 

Q14: What is a slope with one end higher than the other that makes it easier to move objects?
Ans: The term for a slope that has one end higher than the other, making it easier to move objects, is an inclined plane.

Q15: What simple machine consists of a wheel attached to a rod called an axle?
Ans: The simple machine that consists of a wheel attached to a rod is known as a wheel and axle.