motion and forces

Question 1

what is a vector and what are 3 examples?

Answer 1

something that has a magnitude and direction e.g. velocity, displacement, acceleration

Question 2

what is a scalar and what are 3 examples?

Answer 2

something that has just a magnitude e.g. speed, distance, time

Question 3

in a displacement tine graph, what does a horizontal line show?

Answer 3

the object is stationary

Question 4

in a velocity time graph, what does a horizontal line show?

Answer 4

shows the object is at a constant speed

Question 5

what is the typical speed when walking?

Answer 5

5km/h

Question 6

what is the typical speed when cycling?

Answer 6

15km/h

Question 7

what is newton’s first law?

Answer 7

an object will remain at a constant velocity unless acted on by a resultant force

Question 8

what is newton’s second law?

Answer 8

the greater the force applied, the greater the acceleration
the greater the mass, the more force needed to apply

Question 9

what is newton’s third law?

Answer 9

every force has an opposite force acting on it

Question 10

what is the ruler drop test?

Answer 10

• someone holds a ruler just above the other persons open hand
• they drop it at a random time
• record the distance on the ruler and repeat

Question 11

which things affect your thinking distance?

Answer 11

• speed
• tiredness
• drugs/alcohol
• distractions

Question 12

which things affect your breaking distance?

Answer 12

• speed
• road conditions
• tire conditions
• brake pads