Reference no: EM132522076

Q1. Consider the scenario shown in figure 1 below. Harry leaves home at 9:05 and runs at constant speed to the lamppost. He reaches the lamppost at 9:07, he then immediately turns, and runs to the tree. Harry arrives at the tree at 9:10.

(i) What is Harry's average velocity, in yards/min, during each of the two intervals?

(ii) What is Harry's average velocity, in yards/min, for the entire run?

Figure 1:

Q2. A wheel starts from rest and rotates about its axis with constant angular acceleration. It rotates 25 radians in 5 seconds. During this time find

(a) the magnitude of angular acceleration

(b) magnitude of average angular velocity

(c) instantaneous angular velocity of the wheel after 5 seconds

(d) if the angular acceleration remains same, find the additional angle the wheel will rotate in the next 5 seconds (i.e. from t=5 seconds to t=10 seconds)

Q3. Are the following inertial frames of reference? Explain your answer.

(i) A car driving at a steady speed up a 10-degree incline.

(ii) A car driving at steady speed around a curve.

(iii) A hot air balloon rising straight up at steady speed.

(iv) A skydiver just after leaping out of an airplane.

(v) A space shuttle orbiting earth.