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Subject:PhysicsPrice: Bought3
1.Starting from rest at a stoplight you accelerate at 3.8 m/s2 for 7.6 s, the drive at a constant speed for 12s. You then see a police car and decelerate at 5 m/s2 for 1.6 s. What was your final speed in meters per second?
2.A tennis ball is served at 22 m/s and returned in the opposite direction at 28 m/s. If the collision with the racket took 1.3 ms. What was the magnitude of the acceleration of the ball (in m/s2)?
3.At t = 1.10 s, a particle moving with a constant velocity is located at x = 2.30 m. At t = 5.30 s, the particle is located at x = 8.90 m. Determine the velocity (in m/s) of the particle in the x-direction.
4.The position of an object as a function of time is given by x = (-2.0)t2 +(29.0)t +0.0, where x is in meters and t is in seconds. Determine the average speed (in m/s) of the object between t = 0.0 s and 9.0 s.
