Question 1
Question
How can you measure the speed of an object?
Question 2
Question
The faster the speed of an object:
Answer

the greater the distance it travels

the lighter the object is

the shorter the time it takes to travel a particular distance

the quicker the acceleration of the object

the larger the surface area of the object, therefore creating more drag
Question 3
Answer

distance * time

((u+v)/2) * t

distance / time

speed / distance
Question 4
Question
Why is average distance used?
Answer

to make the answer more reliable

the speed may change over a given distance, so the average distance over the whole journey is used

the speed may change direction, so it is better to use an average DISTANCE instead of speed
Question 5
Question
How do speed cameras work?
Question 6
Question
What is the formula for calculating the speed of a car using speed cameras?
Question 7
Question
(Distancetime graphs) The steeper the gradient....
Question 8
Question
(distance  time graphs) a straight diagonal line shows...
Answer

a steady speed

acceleration
Question 9
Question
(distancetime graphs) a straight horizontal line () shows.....
Question 10
Question
(distancetime graphs) a steeper diagonal line means....
Answer

an increase in speed (object is going faster than it was before)

object is moving at a steady speed

object is accelerating

car has gone past the speed limit
Question 11
Question
(distancetime graphs) a diagonal line going downwards means....
Question 12
Question
How do you work out the speed of an object on a distancetime graph?
Question 13
Question
the acceleration / deceleration of an object is..... ?
Question 14
Question
how do you measure acceleration and deceleration?
Question 15
Question
How do you work out the acceleration of a moving object?
Question 16
Question
Example question: a car accelerates at 1.5 m/s2 for 12 seconds.
Calculate the change in speed of the car
Question 17
Question
(speedtime graphs) a horizontal line means...
Answer

No acceleration (0 m/s2)

Constant acceleration
Question 18
Question
(speedtime graphs) a positive diagonal line shows....
Answer

acceleration

an increase in speed
Question 19
Question
(speedtime graphs) a negative diagonal line shows..
Answer

deceleration

going backwards
Question 20
Question
(speedtime graphs) the area underneath the speedtime can be used to measure....
Answer

distance travelled

total time taken
Question 21
Question
How would you calculate the total distance travelled on a speedtime graph?
Answer

Cut the graph into triangles and rectangles, then find the area for each shape and add them all up

multiply the yaxis by the xaxis
Question 22
Question
What is Force measured in?
Question 23
Question
Forces can cause objects to....?
Answer

accelerate

decellerate

to be heavier
Question 24
Question
Weight causes an object to have.... ?
Answer

gravity

force

more acceleration
Question 25
Question
How does friction affect a car?
Question 26
Question
What happens when a sky diver opens up a parachute midjump?
Answer

Air resistance

Friction

Gravity
Question 27
Question
What happens to a skydiver midjump when air resistance and weight are balanced?
Question 28
Question
if an unbalanced force acts, the acceleration of an object will depend on: ?
Answer

the force applied to the object

the mass of the object

the speed of the object

the surface area of the object (larger surface area will create more drag)

the density of the object
Question 29
Question
more mass = ... ?
Answer

= more acceleration

= less acceleration

= less kinetic energy
Question 30
Question
What is the formula for the relationship between force, mass and acceleation
resultant force (N) = .... ?