1.1-1.24

Question 1

Velocity

Answer 1

The speed of an object in a given direction

Question 2

Distance/ time graph

Answer 2

Distance y axis

Time x axis

Question 3

Speed/ time graph

Answer 3

Speed y axis

Time x axis

Question 4

Distance travelled of a speed/time graph

Answer 4

Area under the graph

Question 5

final speed equation (SUVAT)

Answer 5

v2 = u2 + (2 × a × s)

Question 6

Effects of forces

Answer 6

Forces can act on a body to change the velocity, so the speed, direction or both.
Or forces can change the shape of a body stretching it, squishing it or twisting it.

Question 7

different types of forces:

Answer 7

Weight, tension, friction, air resistance, normal, thrust, lift and upthrust

Question 8

Weight

Answer 8

Pulls an object towards the center of a large mass

Question 9

Tension

Answer 9

A force in a rope or cable being pulled

Question 10

Friction

Answer 10

A counter force caused when two object rub together

Question 11

Air resistance

Answer 11

A counter force produced when an object travels through the air

Question 12

Normal

Answer 12

Upward force from a surface to counter weight

Question 13

Thrust

Answer 13

A pushing force (e.g. by an engine / rocket)

Question 14

Lift

Answer 14

Upwards force on a plane or helicopter

Question 15

Upthrust

Answer 15

Upwards force in water

Question 16

Vector

Answer 16

A vector is both magnitude (size) and direction

Question 17

Scalar

Answer 17

When something is not a vector (doesn’t have size or direction)

Question 18

Force is a vector quantity

Answer 18

Force has a magnitude measured in (N) but it also has a direction, a push or a pull, up, down, left or right. So force is a vector.

Question 19

Friction always act in the …. direction to motion

Answer 19

opposite

Question 20

force equation

Answer 20

force = mass x acceleration

Question 21

Weight equation

Answer 21

weight = mass x gravitational field strength (10)

Question 22

Sum of stopping distance

Answer 22

Thinking distance + breaking distance

Question 23

Factors that affect thinking distance

Answer 23

Tiredness, alcohol consumption, medicines, drugs (avoid it) and phone

Question 24

Factors that affect breaking distance

Answer 24

Wet roads, icy roads, driving too fast, breaks worn out, tyres worn out.

Question 25

forces acting on falling objects

Answer 25

1) At the start of his jump the air resistance is 0 so he accelerated downwards
2) As his speed increases air resistance increases
3) Eventually air resistance will be enough to equal his weight. The forces become balanced so his speed is constant (Terminal velocity)

Question 26

Hooke’s law

Answer 26

extension is directly proportional to force applied. This is shown by the straight line on the force-extension graph. Hooke’s law is obeyed as long as the line is straight.

Question 27

Elastic behaviour

Answer 27

the ability of a material to recover its original shape after the forces causing deformation have been removed