Forensic Science: Questions And Answers

3928 Words16 Pages
5. A stone is thrown from O at an angle to the horizontal. Which sketch below best shows the path of the stone when air resistance is not neglected? On each sketch, the broken line shows the path for the same stone in a vacuum. b Which of the 3 punts has the longest hang time? 4 A battleship simultaneously fires two shells at two enemy submarines. The shells are launched with the same initial velocity. If the shells follow the trajectories shown, which submarine gets hit first ? 2 3) both at the same time For a cannon on Earth, the cannonball would follow path 2. Instead, if the same cannon were on the Moon, where g = 1.6 m/s2, which path would the cannonball take in the same situation? 4 A block of mass m…show more content…
How much work is needed to accelerate the car from 50 km/hr to 150 km/hr? 1) 2 W0 2) 3 W0 3) 6 W0 4) 8 W0 5) 9 W0 4 Two blocks of mass m1 and m2 (m1 > m2) slide on a frictionless floor and have the same kinetic energy when they hit a long rough stretch (m > 0), which slows them down to a stop. Which one goes farther? 1) m1 2) m2 3) they will go the same distance 2 A golfer making a putt gives the ball an initial velocity of v0, but he has badly misjudged the putt, and the ball only travels one-quarter of the distance to the hole. If the resistance force due to the grass is constant, what speed should he have given the ball (from its original position) in order to make it into the hole? 1) 2 v0 2) 3 v0 3) 4 v0 4) 8 v0 5) 16 v0 1 You and your friend both solve a problem involving a skier going down a slope, starting from rest. The two of you have chosen different levels for y = 0 in this problem. Which of the following quantities will you and your friend agree on? A) skier’s PE B) skier’s change in PE C) skier’s final KE 1) only B 2) only C 3) A, B, and C 4) only A and

More about Forensic Science: Questions And Answers

Open Document