Answer: A small mailbag is released from a helicopter that is descending steadily at 1.53 m/s. Then,
a) after 4s, the speed of the mailbox will be, 40.73m/s downwards.
b)78.4m downwards.
c) v=37.67m/s downward. and d=78.4m downward.
Explanation: To find the answer, we need to know more about the equations of uniformly accelerated motion.
<h3>What are the equations of uniformly accelerated motion?</h3>
- The equations of uniformly accelerated motion under gravity are,
<h3>How to solve the problem?</h3>
- a) speed of the mailbag after 4s,
- b) How far it is below the helicopter,
- c) If the helicopter is rising steadily, then v and d will be,
Thus, we can conclude that, the answers to the question are, a) after 4s, the speed of the mailbox will be, 40.73m/s downwards.
b)78.4m downwards.
c) v=37.67m/s downward. and d=78.4m downward.
Learn more about the equation of uniformly accelerated motion here:
brainly.com/question/28044927
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Answer:
False
Explanation:
<em>If one of the bulbs is removed from the series, the other bulb will not come on at all.</em>
This is because the removal of one of the bulbs would interrupt the flow of current though the entire circuit.
Hence, that the other one will get brighter if one of two bulbs in a circuit is removed from its socket is not true.
One
A wire carrying a current creates a circular field. Not A.
B is pretty uniform. I would pick it.
C The lines bend around the north and south poles. Not C
D Same Remark as C.
Two
- The force exerted by the magnetic field is the palm of your right hand.
- Your thumb is the direction of the charged stream
- The fingers are the direction of B which I take to be into the page.
If all these are in agreement with what you think you have been given then A is the correct answer. The proton will be defected in the direction of the palm.
Three
As stated in One the fingers point in the direction of B, The thumb is the direction of the charge and the palm is the direction of the force when the item is a plus charge. When the travelling charge is minus as this one is, use the back of your hand. In that case, The electron will be deflected downward. This assumes the Magnetic field is pointing into the page.
The answer is A.
Answer:
25.9 m/s
Explanation:
mass of ball, m = 0.145 kg
initial velocity, u = + 32 m/s
It bounce back with the velocity but in opposite direction so final velocity,
v = - v
Impulse, I = - 8.4 Ns
Impulse is defined as the change in momentum
I = m v - mu = m (v - u)
- 8.4 = 0.145 x (- v - 3 2)
- 57.9 = - v - 32
v = 57.9 - 32 = 25.9 m/s
Thus, the final speed of the ball is 25.9 m/s