1,suppose a ferrari can accelerat from rest 100 miles per hour in 9 seconds. A m

Question

1,suppose a ferrari can accelerat from rest 100 miles per hour in 9 seconds. A modified morder pickup truck in thailand , like a new Isuzu D-max , can accelerate from rest to 100 kilometers per hour in 9 seconds.

1.1, if there is a race between these two cars ,who will win race? Ans.......................................

1.2, And Why?...............................................................

2, In a cartesian coordinnate system,a hotel is located at the position (-231,55120. A tourist is standing at the position (231,-512).

2.1, what is the approximate direction (in a straight direction) that the tourist should walk to get to the hotel?.(N,NE,E,S,SE,W,NW,SW) Ans.......................................................

2.2, And why ?..................................................................

3,In a plane polar coordinate system, suppose the orgin  of the system is assumed to be at the center of a city. the x-axis is lying along the East -west direction of the city, and the y-axis is on the North-South direction of the city.A passenger helicopter is locating at (r,a) position. An empty football field that is big enough for the helicopter to land on is locating at (s,B) position.

3.1, If a is angle within the second quadrant (between 90 and 180 degrees), and B is a+270 degrees, what is the approximate direction (in a straight direction) that the helicopter should fly in order to deliver the passenger to the football field? (N,NE,E,S,SE,W,NW,SW)Ans...................................................

3.2, And why ?.....................................

4, A student is standing somewhere along the path between two buildings . when the student looks at the top of the left buliding(A), his head is up at 39.0 degrees. when he looks at the top of the right building (B), his head is up at 49.0 degrees.

4.1 Which building is taller?(A or B) Ans............................................

4.2 And why ?...........................................

5, A student is standing at the top of a building that is assumed to be very high . The student simply drops a coin to the ground .At two thirds of the height of the building (from the ground level), the coin is accelerating at a meter/sec2. At on third of the height of the building(from the ground level), the coin is accelerating at B meter/sec2

5.1, which acceleration is greater? (a or B)Ans...................................

5.2, And why?................................

Explanation / Answer

1.1 ferrari

1.2 becoz miles is greater than km and hence ferrari will have greater acceleration hence speed and will win the race

2.1 north west (NW)

2.2 as hotel is in 2nd quadrant and man os standing in 4th quadrant therfore he have to walk in north west direction

3.1 south east (SE)

3.2 as helipcopter is in 2nd quadrant and football field is in 4th hence south east

4.1 cant say which buiding is taller

4.2 as to know the height of both buiding we requires the distance if student from both the buiding alon with angle.

5.1 both a and B will be equal

5.2 as accelration due to gravity is constant = 9.8m/s^2

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