The position of a 2 kg object is given as r(t) = Bt2 + 5, where x is in meters and t is in seconds. (a) Determine the force F responsible for this motion. (3) (b) If the force only results in a change in the kinetic energy of the object of 200 J between t1 = 0 s and t2 = 5 s, determine the value of 3. (3) (c) Without using kinematics (equations of motion), determine the displacement of the object during these 5 seconds referred to in part (b). (2)

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2

dopamine..

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