Forces

Question 1

What is a Scalar quantity?

Answer 1

Only has a size (magnitude)

Question 2

What is a Vector quantity?

Answer 2

Has both a size and a direction

Question 3

What is force?

Answer 3

A push or pull that acts on an object due to the interaction with another object.

Question 5

Is force a Vector or a Scalar quantity?

Answer 5

Vector

Question 6

What is a non-contact force?

Answer 6

When objects are physically sepreated.

Question 6

What is a contact force?

Answer 6

When objects are physically touching.

Question 7

Name Four contact forces.

Answer 7

Friction, Air resistance, Tension, Normal contact force.

Question 8

Name three non-contact forces.

Answer 8

Gravitational, Electrostatic, Magnetic

Question 9

What is the same about the interaction pair of forces when two objects interact with each other?

Answer 9

The forces are the same size.

Question 10

What is different about the interaction pair of forces when two forces interact with each other

Answer 10

Forces are in opposite directions.

Question 11

what is the size of the resultant force on an object if the forces on it are balanced?

Answer 11

Zero.

Question 12

What is the name for the force acting on an object due to gravity?

Answer 12

Weight.

Question 13

What instrument can be used to measure the weight of an object?

Answer 13

Calibrated spring-balance (newtonmeter)

Question 14

What is the centre of mass?

Answer 14

The point through which the weight of an object can be considered to act.

Question 15

what is elastic deformation?

Answer 15

When an object can go back to its original shape and size when deforming forces are removed. (e.g Pressure)

Question 16

what is inelastic deformation?

Answer 16

When an object does not go back to it’s original shape and size when deforming forces are removed.

Question 17

How do you find the spring constant from a force-extention graph of a spring?

Answer 17

find the gradient of the straight line section.