Resultant Forces

Question 1

Name the 6 types of forces

Answer 1

• weight ➡️gravity
• water resistance ➡️friction
• air resistance ➡️friction
• thrust
• upthrust ➡️floating
• reaction

Question 2

What acting forces does a moving car have?

Answer 2

Reaction
⬆️
Friction ⬅️ CAR ➡️ Thrust
⬇️
Weight - Balanced - constant speed

Question 3

What is resultant force?

Answer 3

The sum of all forces ➡️ the overall force

Question 4

Equation for resultant force

Answer 4

resultant force = mass x acceleration

Question 5

What is resultant force?

Answer 5

The sum of all forces ➡️ the overall force

Question 6

Unit for force

Answer 6

N

Question 7

Unit for mass

Answer 7

kg

Question 8

Unit for acceleration

Answer 8

m/s 2

Question 9

What acting forces does a rocket have?

Answer 9

Balanced

                     Friction ⬅️  🚀  ➡️Thrust

Question 10

If a parachutist’s parachute is up, why is the upwards force bigger?

Answer 10

Because it has a parachute so air resistance is acting on the forces.

Question 11

If a skydiver is in a tuck position, why will it fall faster through the air?

Answer 11

• It’s more streamlined

- has less air resistance

Question 12

If the force of a spring is removed it will be…….

Answer 12

permanently deformed

Question 13

Give 2 examples of objects that can store elastic potential energy and why

Answer 13

• Springs on a playground ride
• Stretched bungee cords

Because they can be stretched but will always go back to it’s original shape and size.