Answer:
1. Which of the following actions is permissible when you are graphically adding one vector to another:
Explanation:
: move the vector, rotate the vector, change the vector's length?
Answer:
the constant force applied by Kitty is 8 N.
Explanation:
Given;
work done by Kitty, W = 32 J
distance moved by Kitty's trolley, d = 4 m
Let the constant force applied by Kitty = F
The work done by Kitty is calculated as follows;
W = F x d
F = W / d
F = 32 / 4
F = 8 N.
Therefore, the constant force applied by Kitty is 8 N.
<span>The answer is transformer. They utilize
electromagnetic induction to generate current. This is only possible in
alternating current due to the differential increase and decrease of electrical
current that induces changes in magnetic flux in the coil. This varies the
magnetic flux of the primary coil that generates current in the secondary coil.</span>
Answer:
So the conclusion is that in presence of air net force acting downward reduces for feather and hence falls slower than coin. But in absence of air resistance, net downward force is just equal to force due to gravity which is same for both coin and feather and hence they fall down at the same rate.
The speed of the melon as it flies off the performer's head is 0.3 m/s
<h3>Law of conservation of momentum?</h3>
The law of conservation of momentum states that for a system of colliding bodies, the total momentum before the collision is equal to the total momentum after the collision, provided there is no net external force acting on the bodies.
To find the speed of the melon, we use the formula from the law of conservation of momentum.
Formula:
- mu+m'u' = mv+m'v'............ Equation
Where:
- m = mass of the melon
- u = initial velocity of the melon
- m' = mass of the arrow
- u' = initial velocity of the arrow
- v = final velocity of the melon
- v' = final velocity of the arrow.
From the question,
Given:
- m = 2 kg
- m' = 50 g = 0.05 kg
- u = 0 m/s (at rest)
- u' = 30 m/s
- v' = 18 m/s.
Substitute these values into equation 1
- (2×0)+(0.05×30) = (0.05×18)+(2×v)
- 0+1.5 = 0.9+2v
- 2v = 1.5-0.9
- 2v = 0.6
- v = 0.3 m/s.
Hence, The speed of the melon as it flies off the performer's head is 0.3 m/s.
Learn more about the law of conservation of momentum here: brainly.com/question/7538238