is moving from the rest and reach a

46 3:14Y SITUATION 4. The rectilinear motion of a particle is governed by a where a is in m/s² and x is in meters. Given that at time t = 1sec, x = 2m and v= 2m/s. a. Write the equarion of motion b. Determine the position, velocity and acceleration at t = 4sec. ||| -16 G U

boy sees a deer run directly away from him. The deer is running with a speed of 20 mi/hr. The boy gives chase and runs with a speed of 8 mi/hr. What is the speed of the deer relative to the boy?

Answer parts a, and b of the following question. 7. a) Arthur and Betty start walking toward each other when they are 100 m apart. Arthur has a speed of 3.0 m/s and Betty has a speed of 2.0 m/s. How long does it take for them to meet? b) The captain orders his starship to accelerate from rest at a rate of "1 g" (1 g = 9.8 m/s2). How many days does it take the starship to reach 10% the speed of light? (Light travels at 3.0 × 108 m/s.)

The motion of a particle moving in space from t=0 to t=4 seconds is defined by the following velocities: Vx=2t2, Vy=4-t2, Vz=8t. What is the total distance traveled by the particle after 4 seconds in meters? answer: 81 meters Explain every process.

An object moves along a straight line and experiences a constant acceleration of +1.36 cm/s2. At t = 4.6 s, its velocity is -3.41 cm/s. Express your answers in cm/s. What was the object’s velocity at t = 1.86 s?

m m 2 Traveling with an initial speed of 128 kr, a Cessna 172 accelerates at 6000kr during level flight. How long will it take to reach a speed of 226kr ? Give your answer in seconds (s).

A ball is dropped from the rest in a liquid and the acceleration of the ball as a function of velocity is given by a = 32 – 0.25v where a is in m/s^2 and v is in m/s. What is the distance the ball had traveled after 2 seconds?

Susan lives 1.85 km [E] from the school and her good friend, Mary, lives 1.14 km [W] from the school If it took Susan 35 minutes and 20 seconds to travel from her house to Mary's house, what would be Susan's average velocity, in m/s? 1.4 m/s [E] 1.41 x 103 m/s [W] 1.4 m/s [W] 0.335 m/s [E]

The figure shows the acceleration-time plot of an object. What is the acceleration of the object at time t = 5s. O 15 ft/s² O 6 ft/s² 0 ft/s² O 3 ft/s² v (ft/s) 30 16 10 23 -t (s)