Question

3. A helicopter travelling at a velocity of 15 m/s [W] accelerates uniformly at a rate of 7.0 m/s2 [E] for 4.0 s. What is the helicopter’s final velocity?

4. Two go-carts, A and B, race each other around a 1.0 km track. Go-cart A travels at a constant speed of 20.0 m/s. Go-cart B accelerates uniformly from rest at a rate of 0.333 m/s2 . Which go-cart wins the race and by how much time?

5. A boat increases its speed from 5.0 m/s to 7.5 m/s over a distance of 50.0 m. What is the boat’s acceleration?

6. Within 4.0 s of liftoff, a spacecraft that is uniformly accelerating straight upward from rest reaches an altitude of 4.50 3 102 m [up]. T/I (a) What is the spacecraft’s acceleration? (b) At what velocity is the spacecraft travelling when it reaches this altitude?

Answer 1

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