APPLYING NEWTONS SECOND LAW NOTES

When doing these questions what is key about the mass?

Must be in kg before doing the calculation

Find the force in the rope

T - 500 = 50 x acceleration

T - 500 = 10

T = 510N

A car of mass 700kg is brought to rest in 7 seconds from a speed of 20 m/s. What constant force is necessary to produce this deceleration?

S = ?, U = 20, V = 0, A = ?, T = 7

Acceleration = 0-20/7 = -20/7

F = m x a

Force = 700 × -20/7 = -2000N

How many kilograms are in a tonne?

1 tonne = 1000kg

Car with mass 900kg tows a caravan of mass 700kg along a level road. Engine exerts a forward force of 2400N and any resistance can be ignored. Find the acceleration produced and the tension in tow bar

ACCELERATION = whole diagram

TENSION = one vehicle

GO DO QUESTIONS NOW

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