Answer:
Average speed = 129 m/min
Explanation:
The length of the wood log = 1161 metres
Time = 9 minutes
Speed =
So Speed =
= 129 metres/minute
Therefore the average speed = 129 m/min
Answer:
Explanation:
a )
We shall apply the concept of impulse .
Impulse = force x time = change in momentum
= 5 x 4 = 2 ( V - 3 ) , where V is final velocity of the object
20 = 2V - 6
V = 13 m /s
b )
Impulse applied = - 7 x 4 = - 28 kg m/s ( negative as direction of force is opposite motion )
If v be the final velocity
2 x 3 - 28 = 2 v ( initial momentum - change in momentum = final momentum )
- 22 = 2v
v = - 11 m /s
object will move with 11 m /s in opposite direction .
The answer is C) a rolling bowling ball because kinetic energy is the energy of movement and potential energy is the energies of the others, since there are not in movement. i hope this helps.
"Though a force, or a resulting sum of forces, may be centripetal, there is not an actual "Centripetal Force" that would appear on an FBD. Since an FBD is a diagram of physical forces at work upon a body, and a centripetal force is not the reaction of some physical object upon another, it would not be proper to show it. You might have a tension force, a weight force, a normal force, electric forces, magnetic forces, or any number of reactions, but actually labeling any of them "centripetal" would be unconventional".
-Yahoo
The answer is Knot Tying. Frieda, age 16, is a boating enthusiast who can tie 20 different kinds of knots. This type of knowledge is most aptly described as Knot Tying knowledge. T<span>he </span>knowledge<span> of how </span>to tie<span> and use </span>knots<span> is absolutely necessary. </span>Every boater should know how to tie boating knots to ensure safety to her and ger boat when exploring the waters.