Question

1 A)Towns A and B in the figure below are 80.0 km apart. A couple arranges to drive from town A and meet a couple driving from town B at the lake, L. The two couples leave simultaneously and drive for 2.15 h in the directions shown. Car 1 (leaving from Town A) has a speed of 96.0 km/h.the cars arrive simultaneously at the lake. If the couple departing from town B are delayed by a flat tire, how much later (in hours) can they leave town B after the first couple leaves town A and still reach the lake at the same time as the couple from town A? Assume that the speed limit on the road taken by the couple from town B is 88.5 km/h (55 mph) and that the couple obeys the speed limit.

(a) Towns A and B in the figure below are 80.0 km apart. A couple arranges to drive from town A and meet a couple driving from town B at the lake, L. The two couples leave simultaneously and drive for 2.15 h in the directions shown. Car 1 (leaving from Town A) has a speed of 96.0 km/h. If the cars arrive simultaneously at the lake, what is the speed (in km/h) of car 2 (leaving from Town B)? 40.00 80.0 km------ - ---OV. km B km/h (b) What If? If the couple departing from town B are delayed by a flat tire, how much later in hours) can they leave town B after the first couple leaves town A and still reach the lake at the same time as the couple from town A? Assume that the speed limit on the road taken by the couple from town B is 88.5 km/h (55 mph) and that the couple obeys the speed limit. hours

B) In a local bar, a customer slides an empty beer mug down the counter for a refill. The height of the counter is 1.10 m. The mug slides off the counter and strikes the floor 1.80 m from the base of the counter.What was the direction of the mug's velocity just before it hit the floor?

Answer 1

AL= ut AL= (96 km/h) (2.15h) 206.4 km AL = 206.4 km 40 80 km DL² = 42²+ A22 – 2 ADAL COSUS (Cosine Law) BL = 80++ 206.97 - 2(80) (20604) 60340% BL = 154 km AL = vt & = 154 u ve = 7106 km/h 2.15 -pore 6 BL = Samonte & - 154 km 88-5 kalh 1.74 h 4 = It = f-t, a lot = 0.41 hr