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What is the momentum of a man of mass75 kg when he walks with a uniform velocity of 2 m s?
Wiki User
∙ 9y ago
The momentum of a man of mass 75 kg when he walks with a uniform velocity of 2 m/s is 150 kgm/s, from p=mv.
Wiki User
∙ 9y ago
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A student walks 0.85 km to class in 5 minutes and then back in 7.1 minutes What is his average velocity?
Since average velocity is total displacement over total time, the answer is 0m/s, because there is no displacement. (Remember, velocity has a direction unlike speed).
Questions on motion for class 9?
1. what is the speed with direction known as? 2. a boy walks from his classroom to the book shop covers a distance of 20 m in 25 s to reach the bookshop buying a book ,he travels the same distance in same time to reach back to the class room . find (a) average speed (b) average velocity of the boy. 3. what is uniform circular motion? 4.what is the net acceleration in a non uniform motion? 5.what is the term used for negative acceleration?
What is a velocity at rest?
You add the velocity of the other frame of reference, to the object's velocity compared to that frame of reference. Example: a train moves at 60 km/h; a man in the train walks forward at 5 km/h (that is with respect to the train). Adding the two speeds gives 65 km/h. If the movements are in different directions, vector additions is needed. Basically you can add x, y, and z-components of the velocities separately. The above assumes the speeds are non-relativistic; otherwise a different and more complicated formula is required.
When one walks forward he interacts with the earth what is the momentumm of the recoil of the earth why don't we feel it?
Without getting into the difference between linear and angular momentum, it should be enough to simply point out that the Earth's mass is equal to the mass of something like 60 thousand billion billions of you, and that for equal momentum, the velocities would be in the inverse of the same ratio.
A 4.5 kg dog stands on a 18 kg flatboat at distance 6.1 m from the shore The dog walks 2.4 m along the boat toward the shore and then stops Assuming no friction between the boat and the water find?
You can use conservation of momentum. since dP=0 than 4.5Vdog=18Vboat so Vboat=1/4Vdog because of this you know the displacement of the dog is 4x greater than the displacement of the boat. therefore Dboat=0.6m away from shore Now we must consider the momentum of the system 22.5Vsys=18Vboat+4.5Vdog (since these are Vfinals the final momentum of the dog is zero because his Vfinal is zero) so Vsys=4/5Vboat this way we know that the displacement of the system is 4/5 that of the boat so dsys=4/5(0.6)=0.48m The dog's new distance will be the original distance minus (ddog-dsys) This is 6.1-(2.4-.48)=4.18m from shore
Name a way you can tell that a man is in the army?
Crewcut Uniform Clean Cut The Way He Walks
A student walks 0.85 km to class in 5 minutes and then back in 7.1 minutes What is his average velocity?
Since average velocity is total displacement over total time, the answer is 0m/s, because there is no displacement. (Remember, velocity has a direction unlike speed).
When a man walks into a restaurant waiter says good day Admiral why did the waiter called him Admiral?
Because He Was Wearing His Uniform
When a train moves along a straight track at a velocity of 95 km hr north A person walks toward the back of the train at a velocity of 3 km hr south what is the persons velocity relative to the ground?
If the person sat on the train their velocity relative to the ground would be 95kph. But he/she is goind 3kph to oppose this. So 95-3 = 92 kph to the north is velocity of person relative to the ground.
Martin walks one mile west Maya walks one mile east in the same amount of time Do they have different velocities?
Yes. Velocity is speed and direction. One is 1Mile p/time east while the other is 1Mile p/time west. The direction has to be taken into account with velocity. This is what separated it from speed
Questions on motion for class 9?
1. what is the speed with direction known as? 2. a boy walks from his classroom to the book shop covers a distance of 20 m in 25 s to reach the bookshop buying a book ,he travels the same distance in same time to reach back to the class room . find (a) average speed (b) average velocity of the boy. 3. what is uniform circular motion? 4.what is the net acceleration in a non uniform motion? 5.what is the term used for negative acceleration?
How do you generate a position-time graph from a velocity time graph?
A girl walks along a straight path to drop a letter in the letterbox and comes back to his initial position. Her displacement-time graph. Plot a velocity-time graph for the same
On a bus traveling north at 20.0ms a child stands up and walks to the back of the at 1.3ms What is the child's resultant velocity?
It is 21.3 m/s North
What is a velocity at rest?
You add the velocity of the other frame of reference, to the object's velocity compared to that frame of reference. Example: a train moves at 60 km/h; a man in the train walks forward at 5 km/h (that is with respect to the train). Adding the two speeds gives 65 km/h. If the movements are in different directions, vector additions is needed. Basically you can add x, y, and z-components of the velocities separately. The above assumes the speeds are non-relativistic; otherwise a different and more complicated formula is required.
What is the formula of position?
For positive velocity: p=vt(Position=velocity*time) The velocity will be positive.For negative velocity: p=p(0)+vt(Note: The "0" represents the position at time "0" which is also known as the y-intercept, which is the point where the line crosses the vertical axis. A different label, such as x could be used to represent the position.) The velocity will be negative in this formula.Example: Write the position equation for a person who starts 3 meters behind the reference point and walks with a constant velocity v=6 m/s in the positive direction.Answer: p=-3+6t
When one walks forward he interacts with the earth what is the momentumm of the recoil of the earth why don't we feel it?
Without getting into the difference between linear and angular momentum, it should be enough to simply point out that the Earth's mass is equal to the mass of something like 60 thousand billion billions of you, and that for equal momentum, the velocities would be in the inverse of the same ratio.
A student walks 0.7 km to class in 5 minutes and then back in 15.2 minutes What is his average velocity in ms?
Total distance is 1.4 km = 1400 m, total time is 20.2 minutes = 1212 seconds. Average speed = 1.155 m/s. Or is this a catch question to see if you understand the difference between speed and velocity? Velocity has a direction as well as a speed, this is called a vector quantity, and since you come back to the starting point, the average velocity is in fact zero. Note that I originally said speed is 1.155 m/s, not velocity.
