2. Examine the velocity-time graph in Figure 11. OA Velocity v. Time 40 30 20 10 0- 0 2 t (s) 4 6 Figure 11 (a) Determine the average acceleration for the entire trip. [ans: 6 m/s forward] (b) Determine the instantaneous acceleration at 3 s and at 5 s. (ans: 6 m/s (forward); (c) Draw a reasonable acceleration-time graph of the motion. ([PEMJOJ] s/w) A
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- A. Select the appropriate choice for each statement. (greater than, less than, or equal to)The magnitude of the acceleration at P is ... that at T. (greater than, less than, or equal to)The speed at S is ... that at P. (greater than, less than or equal to)The speed at P is ... that at T. (greater than, less than or equal to)The speed at N is ... that at T. (greater than, less than or equal to)The x-acceleration at S is ... 0. (greater than, less than or equal to)The magnitude of the acceleration at U is ... that at R.A street ball is dropped onto a hard floor from a height of 16.1 m and rebounds to a height of 1.34 m. a. Calculate its acceleration during contact with the floor if that contact lasts 0.0900 ms. b. What distance did the ball compress during its collision with the floor, assuming the floor is absolutely rigid.The trap-jaw ant, found throughout tropical South America, catches its prey by very rapidly closing its mandibles around its victim. Shown is the speed of one of its mandible jaws versus time in microseconds. a. What is the maximum acceleration of the ant’s mandible? b. The mass of a trap-jaw ant’s mandible has been estimated to be about 1.3 x 10-7 kg. Estimate the maximum force exerted by one mandible.
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