Chapter 5a Forces

Question 1

Name 4 scalar quantities

Answer 1

time, mass, temperature, length

Question 1

What is the difference between Scalar and Vectors

Answer 1

Scalar is the size or magnitude only and Vectors is the size and direction

Question 2

Name 4 vector quantities

Answer 2

Force, weight, displacement, velocity

Question 3

What is the equation between displacement, time and velocity

Answer 3

velocity=displacement/
time

Question 4

Name 3 things forces can change

Answer 4

1. shape of an object
2. speed of an object
3. direction

Question 5

Name the 2 categories of forces

Answer 5

Non-contact (gravity, magnetic fields) and contact (friction, air resistance)

Question 6

What is a weight

Answer 6

Weight is the gravitational force acting on a mass

Question 7

What is the equation between Weight, mass and gravity

Answer 7

Weight=Mass x Gravity

Question 8

What is the resultant force

Answer 8

a single force that has the same effect as all the forces acting on the object together

Question 9

What is the centre of mass

Answer 9

the weight of an object is considered act through a single point

Question 10

Free body diagrams

Answer 10

Treat an object as a point so all forces go through that point

Question 11

Work done equation

Answer 11

Work Done (J) = force(N) x Displacement(m)

Question 12

Force and elasticity equation

Answer 12

Force or Weight (N)= Springs constant (N/m)x extension(m)
F=ke

Question 13

What is the link between Moment, Force and Distance over the pivot

Answer 13

m=Fxd

Question 14

Pressure area and force equation

Answer 14

Pressure (Pa)= force (N)/area (m^2)

Question 15

Pressure, vertical height or depth gravitational and density equation

Answer 15

P(pa)= h(m)ρ (Kg/m^3) gravitational (9.8m/s^2)