force and acceleration

Question 1

explain required practical car and acceleration

Answer 1

so ypu have a toy car attached to a string attached to a pulley attached to a weight which starts at like 100g and is lying off the table. the table has chalk marks of the distance the car will travel. record the experiment for timings as its very fast and release the weight. repeat this with different weights. you can also do this with dif masses on the car which will slow down acceleration

Question 2

whats newtons second law of motion

Answer 2

acceleration is proportional to force applied
acceleration is inversely prop to mass of an object
F = A x M

Question 3

whats inetia

Answer 3

an objects tendancy to stay at rest or in uniform motion
/how difficult it is to change the motion of an object

Question 4

what is grav field strength measured in

Answer 4

N/KG

Question 5

whar is terminal velocity

Answer 5

-when an objects oposing force speeds up and becomes equal to its weight and there is no resultnat force, stopping acceleration
- max velocity attainable by an object moving through a fluid

Question 6

what is stopping distance

Answer 6

thinking+ breaking, shortest distance a car can safely stop

Question 7

whats thinking distance

Answer 7

distance travelled by car whilst it takes the driver to react

Question 8

whats breaking distance

Answer 8

distance travlled by car in time the brakes act

Question 9

thinsg that effect thinkin distance

Answer 9

alcohol tiredness speed phones

Question 10

velocity distance accelaeration STUPID equation

Answer 10

V2 - U2 = 2AS

Question 11

what increases the braking force and what is it

Answer 11

• force required to stop a vehicle
• needs more force if the car is going faster or if it weighs more

Question 12

momentum equation

Answer 12

momentum = mass x velocity

Question 13

momentum in a closed system

Answer 13

its equal before and after

Question 14

how to calculate extention

Answer 14

stretched - original

Question 15

whats hookes law

Answer 15

when a spring is stretched furthe rthan it can bounce back it becomes inproprtional to the amount of forced put on it to stretch
therefore on a graph it will not be a line

Question 16

whats hookes law as an equation

Answer 16

F = K x E

Question 17

WHATs a spring consatnt

Answer 17

force needed to extend the spring by one meter

Question 18

whats inertial mass

Answer 18

how hard it is to change the velocity of an object

Question 19

whats weight

Answer 19

force acting on an object due to gravity

Question 20

whats mass

Answer 20

the quantity of matter in an object

Question 21

limit of proportionality/ elastic limit

Answer 21

furthest a spring can be stretched before the extension stops being proprtional to the force applied/ inelastic deformation

Question 22

elastic deformation

Answer 22

change in an objects shape which can be reversed

Question 23

whta does the area uder a force extension graph show

Answer 23

elastic potential energy

Question 24

inelastic deformation

Answer 24

change in shape of an object which cannot be reversed once the forces have been removed

Question 25

whats deformation

Answer 25

change in shape of an object

Question 26

what affects braking distance

Answer 26

• tyre quality
• break squility
• texture of road
• mass of vehicle
• speed of vehicle

Question 27

if a vehicle drives twice as fast, the breaking distance..

Answer 27

will increase by four

Question 28

whats normal contact force

Answer 28

when something pushes back against your force applied w an equal and opposite force