Ch3: Motion

Question 1

What graph is speed the gradient of?

Answer 1

Distance time graph - with distance on the y, and time on the x

Question 2

How is instantaneous speed found?

Answer 2

By finding the gradient of a tangent to a point on the distance/time graph

Question 3

What is the area under a velocity time graph?

Answer 3

Displacement

Question 4

What is the suvat equation for v^2?

Answer 4

v^2=u^2+2as

Question 5

What is the suvat equation for v, not using s?

Answer 5

v=u+at

Question 6

What is the suvat equation using u,s,t&a?

Answer 6

s=ut+1/2at^2

Question 7

What is the suvat equation for displacement using initial and final velocities, and time?

Answer 7

s=1/2(u+v)t

Question 8

Finish the equation: s=ut…

Answer 8

s=ut+1/2at^2

Question 9

Finish the equation: s=1/2(…

Answer 9

s=1/2(u+v)t

Question 10

Finish the equation: v^2=..

Answer 10

v^2=u^2+2as

Question 11

Finish the equation v=u+…

Answer 11

v=u+at

Question 12

What is the difference between stopping distance and thinking distance?

Answer 12

Stopping distance is the total distance travelled to stop. Thinking distance is a component of this and is the distance travelled before brakes are applied

Question 13

What is thinking distance + braking distance?

Answer 13

Stopping distance

Question 14

What is u+at?

Answer 14

v

Question 15

What is u^2+2as

Answer 15

v^2

Question 16

What is the equation for thinking distance?

Answer 16

Speed x reaction time

Question 17

What value of g is generally used?

Answer 17

9.81ms^-2

Question 18

How is g measured in the laboratory?

Answer 18

An electromagnet holding a ball over a trap door. Current is turned off, the ball falls and a timer is started; when the ball hits the trap door, the circuit is broken and the timer stops.

Question 19

With no air resistance, what happens to horizontal velocity of a thrown object?

Answer 19

It remains constant