In the given question, we already know
Work done = 150 joules
Force = 120 Newton
Now we know from the study of physics that
Distance (D) = Work done / Force
(a) To find the height upto which the backpack has been lifted,
D = Work done / Force
= 150 / 120
= 15 / 12
= 5 / 4
= 1.25
So the backpack was lifted to a height of 1.25 metres.
(b) Now we have the find the weight of the backpack in pounds
We know that 1 pound = 4.448 Newton
So if
4.448 Newton = 1 pound
Then
120 Newton = (120 / 4.448) pounds
= 26.978 pounds
So the backpack weighed 26.98 pounds.
Answer:
Distance = 10m
Imagine a triangle
Length = 4 - 1 = 3
Height = 2 + 2 =4
Hypothenuse = Displacement
Displacement = 5
Answer: anlien, enemy gnome, spaceship
Explanation:
Answer:
velocity zero and acceleration negative
Explanation:
According to the directions taken in the vector analysis, the direction which is upwards taken as positive, the direction which is downwards is taken as negative.
The direction which is rightwards taken as positive and the direction which is leftwards taken as negative.
here, ball throws vertically upwards and it attains a maximum height. At maximum height the magnitude of velocity is zero but the acceleration is always acting downwards so it is taken as negative in sign.
Answer:
a. E=1440KJ
b. E=360KJ
c. E=1.8 J
Explanation:
I have the power (Watts) is expressed as Energy (Joules) / Time (seconds), also I have to
so, for the lightbulb

Analogously, for the microwave

Now, I have to express the efficiency as Heat energy / power * 100 so
Done