Question

Problem 1,2,3.

MEEN 2302 Sum 2019 HW1 Name Problem 1 12-4. Traveling with an initial speed of 70 km/h, a car accelerates at 6000 km/h2 along a straight road. How long will it take to reach a speed of 120 km/h? Also, through what distance does the car travel during this time? Problem 2 An object freely falling through the atmosphere has an acceleration a -32.2 [1- (v'/160,000)] ft/sec', empirically determined. This equation accounts for drag from earth's atmosphere. If the object is released from rest, determine a) the velocity at time t-15 sec. and b) the maximum attainable velocity of the object.( HINT: use table of integrals) Problem 3 The acceleration due to gravity at an altitude y above the earth's surface is: -32.2 (/20.9 x 10)] Where, the units of a are in ft/s'and y are in ft. Find the height reached by the projectile if it is fired vertically upward with an initial velocity of 3000 ft/s.

Answer 1

DATET en 2 6000 3 second 2 120) CO -7916m

60,000 2. dt 60,000 60,006 2x400 v-400 400 3226 V-100

DATE PAGE o On tv +4001-=-483 -hoo V-400

DATEI PAGE 2_ 6o00o 00 t/se c Salustia

DATE PAGE orm 32.2 32 2 d h -32,2 V v 36 00 32.2 d 2 『ブ 32- 2 209-X10

PAGE DATE 2 x10 0.9X10 20 X10+ 66 8 18