now lets look at a skydiver who jumps out of a plane that has a forward velocity of 40 m/s. ignore air resistance. After 1 second, what is the skydivers forward velocity?

Answers

Answer 1
Answer: If there's no air resistance, then there's nothing that has any effect on his forward
velocity. It's still 40 m/s forward, and it WILL be until he hits the ground.


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The forces acting on a falling leaf are

Answers

Answer:

Gravitational and resistance force.

Explanation:

The push or pull on any object which causes an object to move is called force. The forces can be of many types. The forces acting on the falling leaf are :

  • Gravitational force : The force that acts in downward direction is called the force of gravity. This force pulls every object towards it.
  • Resistance force/ normal : The force that act opposite to gravitational force is called the resistance force. It opposes the direction of motion of the leaf.
the forces acting on a leaf are gravity and air resistance.In some cases the only force acting on an object is gravity, if that occurs then its called freefall. 

A disturbance that transfers energy from place to place is called aa. wave.
b. medium.
c. vibration.
d. compression.

Answers

The term 'wave' is used to refer to a disturbance that transfers energy from one place to another. Waves move energy, not matter, over distances.

The correct option is A.

In groundwater, a "wave" refers to the movement of water through porous subsurface materials, such as soil or rock. These waves can be influenced by various factors, including hydraulic gradients, geological properties, and recharge rates. Groundwater waves can propagate both vertically and horizontally, affecting the flow and distribution of groundwater in underground aquifers. Understanding these waves is crucial for managing and sustaining groundwater resources, as they impact water availability, quality, and the overall behavior of aquifer systems, influencing vital aspects of groundwater management and environmental conservation.

A disturbance that transfers energy from place to place is called a wave. Waves move energy, not matter, across distances. An easy example to visualize this concept is if you throw a pebble into a pond. The energy created by the pebble's impact causes ripples, or waves, to move out from the point of impact. In this case, the water itself doesn't travel across the pond - only the energy does. The other terms - medium, vibration, and compression, all play roles in the transmission of waves, but they are not the name for the energy transfer itself. A medium is what a wave moves through (like air or water), a vibration is a type of movement that can create waves, and a compression is a part of a certain kind of wave. However, the correct term for the energy transfer you're describing is 'wave'.

Hence The correct option is A.

Learn more about Wave here:

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Answer: Option (a) is the correct answer:

Explanation:

A wave is defined as the transfer of energy from one place to another and no exchange of matter.

Whereas medium is a substance through which wave or energy can be transported from one point to another.

On the other hand, vibration is the back and froth motion of particles of a substance or matter.

And compression means to bring the particles of a substance together by increasing the pressure.

Thus, we can conclude that a disturbance that transfers energy from place to place is called a wave.

Draw velocity-ime graph for uniform moion of an object , when initially body is at rest.

Answers

When the body is at rest, its speed is zero, and the graph lies on the x-axis.

When the body is in uniform motion, the speed is constant, and the graph is a horizontal line, parallel to the x-axis and some distance above it.

It's impossible to tell, based on the given information, how these two parts of the
graph are connected.  There must be some sloping (accelerated) portion of the graph
that joins the two sections, but it cannot be accounted for in either the statement
that the body is at rest or that it is in uniform motion, since acceleration ... that is,
any change of speed or direction ... is not 'uniform' motion'.

If the truck has a mass of 2,000 kilograms, what is its momentum? Express your answer in kg·m/sec.

Answers

You don't tell us its speed. If that's the full question and there is no indication of a speed, the answer is 0kg.m/s as it has no momentum

Wait but u don't mention speed, so there's no momentum

If the period wave is 6 seconds what is its frequency

Answers

Answer:

.17Hz

Explanation:

The formula for frequency is f= 1/T , where T is the period.

f = 1/6 and 1/6 ≈ .17

A force of 200 N is required to keep an object sliding at a constant speed of 2 m/s across a rough floor. How much power is being expended to maintain this motion?

Answers

Force x speed = power
200 x 2 = 400 watts

Answer:

Explanation:

Power = work/time

Work = force x distance

power = force X distance/time (velocity)

power = 200N x 2m/s

power = 400 joules