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Describe the difference between “speed” (a scalar quantity) and “velocity” (a vector quantity)

Describe the difference between “speed” (a scalar quantity) and “velocity” (a vector quantity) A car is initially travelling at 12 ms -1 East . After 10 seconds it travels at 20 ms -1 East . Calculate the acceleration. A bus accelerates at 2 ms -2 from rest .

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Describe the difference between “speed” (a scalar quantity) and “velocity” (a vector quantity)

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  1. Describe the difference between “speed” (a scalar quantity) and “velocity” (a vector quantity) • A car is initially travelling at 12 ms-1 East. After 10 seconds it travels at 20 ms-1 East. Calculate the acceleration. • A bus accelerates at 2 ms-2 from rest. • Calculate the final speed of the bus after 5 seconds. • At what time does the bus reach a speed of 16 ms-1?

  2. Δ = ‘delta’ Def: the difference between the initial and the final value. Δ = final value – initial value e.g. Δv = vf - vi

  3. A ball is travelling toward a tennis racquet at 30 ms-1. After a massive backhand the ball is found to be travelling away from the racquet at 15 ms-1. The ball connects with the racquet for 0.3 seconds. Calculate the acceleration of the ball

  4. A ball is travelling toward a tennis racquet at 30 ms-1. After a massive backhand the ball is found to be travelling away from the racquet at 15 ms-1. The ball connects with the racquet for 0.3 seconds. What is the initial velocity? What is the final velocity? What is the change in the velocity? What is the time taken? What is the acceleration?

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