Motion and forces

Question 1

Vector

Answer 1

Has speed and magnitude (e,g displacement, acceleration, velocity)

Question 2

acceleration equations

Answer 2

a= (v-u)/t
v^2-u^2 =2ax

Question 3

Distance/Time graphs

Answer 3

gradient = speed
diagonal line = constant speed
horizontal line = stopped
curve = acceleration/deceleration

Question 4

Velocity/Time graphs

Answer 4

gradient =acceleration
diagonal = constant acceleration/deceleration
horizontal = constant velocity
curve = increasing/decreasing acceleration
area under graph = distance travelled

Question 5

Newton’s 1st law

Answer 5

if there is no resultant force on an object its velocity will remain constant

Question 6

Newton’s 2nd law

Answer 6

F(resultant force) = m(mass) X a(acceleration)

Question 7

Newton’s 3rd law

Answer 7

When two objects interact, the forces exterted onto each other are equal and opposite

Question 8

Equation for weight

Answer 8

W(weight) = m(mass) X g(gravitational field strength)

Question 9

Circular motion

Answer 9

-Resulatant force is towards centre of circle
-A force keeping an object in cricular motion is a centripetal force
-Acceleration is a change in velocity, which is a vector, so if the object in circular motion is at constant speed it is accelerating, because it is constantly changing direction.

Question 10

Inertia

Answer 10

An object’s tendancy to stay at a constant velocity

Question 11

Inertial mass

Answer 11

how difficult it is to change the velocity of an object