17.An automobile traveling along a straight road increases its speed from 30.0 m/s to 50.0 m/s in a distance of 180 m. If the acceleration is constant, how much time elapses while the auto moves this distance? a.6.00 sb.4.50 sc.3.60 sd.4.00 se.9.00 sANS: BPTS:2DIF:Average 18.An object moving on the x axis with a constant acceleration increases its x coordinate by 80 m in a time of 5.0 s and has a velocity of +20 m/s at the end of this time. Determine the acceleration of the object during this motion. 19.An electron, starting from rest and moving with a constant acceleration, travels 2.0 cm in 5.0 ms. Whatis the magnitude of this acceleration? 20.A particle starts from rest at xi= 0 and moves for 10 s with an acceleration of +2.0 cm/s2. For the next 20 s, the acceleration of the particle is 1.0 cm/s2. What is the position of the particle at the end of this motion? 21.A rocket, initially at rest, is fired vertically with an upward acceleration of 10 m/s2. At an altitude of 0.50 km, the engine of the rocket cuts off. What is the maximum altitude it achieves? a.1.9 kmb.1.3 kmc.1.6 kmd.1.0 km
Full file at e.2.1 kmANS: DPTS:3DIF:Challenging 22.A ball is thrown vertically upward with an initial speed of 20 m/s. Two seconds later, a stone is thrown vertically (from the same initial height as the ball) with an initial speed of 24 m/s. At what height above the release point will the ball and stone pass each other? 23.An object is thrown vertically and has an upward velocity of 18 m/s when it reaches one fourth of its maximum height above its launch point. What is the initial (launch) speed of the object? 24.A stone is thrown from the top of a building with an initial velocity of 20 m/s downward. The top of the building is 60 m above the ground. How much time elapses between the instant of release and the instant of impact with the ground?
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- Fall '09
- Acceleration, Velocity, m/s