1 Force and Motion

Question 1

Weight

Answer 1

Weight(N) = Mass(KG) * Gravitational Field Strength (N/KG)

Question 2

Force

Answer 2

• Force(N) = Mass(KG) x Acceleration(M/S²)
• Force(N) = Change in momentum (kgm/s) / time(s)

Question 3

Vector

Answer 3

Magnitude and Direction
-Velocity
-Displacement
-Acceleration
-Force
-Weight
-Momentum

Question 4

Scalar

Answer 4

Magnitude only
-Speed
-Time
-Temperature
-Energy
-Mass

Question 5

Final Speed squared
V²

Answer 5

• Final Speed squared = Initial Speed Squared + 2(Acceleration x Displacement)
• V²(m/s) = U²(m/s) + 2(A(m/s²) x S(m))

Question 6

Acceleration

Answer 6

Acceleration(M/S²) = (Final Speed(m/s) - Initial Speed(m/s)) / Time(s)

Question 7

Momentum

Answer 7

Momentum (kgm/s) = Mass(Kg) x Velocity(m/s)

Question 8

Moment

Answer 8

Moment (Nm) = Force(N) x Distance(M)

Question 9

Pressure

Answer 9

Pressure(Pa) = Force(N) / Area(M^2)

Question 10

Density

Answer 10

Density(Kg/M^3) = Mass(KG) / Volume(M^3)

Question 11

Elastic behaviour

Answer 11

Ability of a material to recover its original shape after the forces causing the deformation have been rmoved

Question 12

Stopping distance

Answer 12

stopping distance = thinking distance + braking distance

Question 13

Hooke’s law

Answer 13

The extension of a string is proportional to the force applied until the limit of proportionality is reached