Q#1=a horse runs 3000 meters in 5 minutes what is its average speed? Q#2 =The di
ID: 1582463 • Letter: Q
Question
Q#1=a horse runs 3000 meters in 5 minutes what is its average speed?
Q#2 =The difference between velocity and speed is about? a)direction, b)angle, c)magnitude, d)position ?
Q#3=which statement is correct concerning acceleration of a falling object if consideration air resistance? a) the acceleration is equal to 9.8ms^2, b)the acceleration is larger then 9.8ms2, c)the acceleration is smaller then 9.8ms^2, d) the acceleration depends on mass of object?
Q#4= Which of the following physiocal quantities is not a force? a)mass, b)weight, c) friction, d)gravity?
Explanation / Answer
Q1)
Given distance d = 3000 m
time t = 5 min = 5 * 60 = 300 s
average speed v = d / t
v = 3000 / 300
v = 10 m/s
Q2)
Speed is a scalar quantity which has only magnitude
velocity is a vector quantity which has both magnitude and direction
The magnitude of velocity is called speed
Q3)
When objects falls down the acceleration due to gravity is down ward where as air Resistance is in upward so net acceleration is less than 9.8 m/s^2
Answer is c)the acceleration is smaller then 9.8ms^2
Q4)
mass has unit (kg)
weight W =m *g (newton)
friction = mue * normal force (newton)
gravity = force exerted by earth (newton)
Answer is a) mass
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