# Physics Holiday Homework

Holiday's homework

Class IX

1 ) Is potential energy a vector or possibly a scalar quantity?

2 . A coach travels at a speed of 60 km/hr for 0. 52hr, at 35 km/h for the next 0. twenty four hours and then В В В В В В at 70 km/h for the next 0. 71h. Precisely what is the average speed of the educate? 3. Plot the distance вЂ“ time charts

a) If the body is sleeping

b) If the body is shifting with a uniform speed

c) When the person is moving using a non-uniform rate.

4. The brakes placed on a car made an speeding of 6 ms-2 inside the opposite В В В direction of the movement. If the car takes 2s to stop after the application of В В В brakes, calculate the space it moves during this time. your five. What is great acceleration and negative speed?

6. В Why is the motion of Satellites around their planets deemed an more rapid В В В В motion? six. Study time (t) versus distance (s) data given below and response the В questions that follow: Time (s)| Range (m)

0| 0

2| 8

4| 16

6| 16

8| 8

10| 0

almost 8. A educate is moving out of a railway station, may be the platform sleeping or in motion regarding theВ train? being unfaithful. (a) Plot a graph of the following data with a proper choice of scale and interpret the kind of motion showed by it. to (s)| 0| 2| 4| 6| 8| 10| 12

d (m)| 0| 1| 4| 9| 16| 25| 36

(b) Abdul, whilst driving to school compute the average speed pertaining to his trip to be twenty km/hr. In the return trip along the same route, there is certainly less traffic and the normal speed is definitely 30 km/hr. What is the typical speed of Abdul's trip? 10. A moving teach is delivered to rest within just 20 sec by applying brake systems. Find the first velocity, in case the retardation due to brakes is 2 m/s2.