Sliding Kinetic Friction is usually greater than Rolling Kinetic Friction. Sliding Kinetic Friction is caused by two objects being dragged together, providing more opportunity for the objects' microscopic hills and valleys to catch.
Is it possible for a body to have average speed but zero average velocity give reason and example?
Yes it is possible.
If a body goes round a circular path then distance covered by one full rotation will be 2 pi r
But the total displacement is 0.
Hence the average speed exists but average velocity does not exist.
On a pendulum, the greatest potential energy is at the highest point of the swing on either side, and the greatest kinetic energy is at the bottom of the swing.
On a roller coaster, the greatest potential energy is at the top of a hill, and the greatest kinetic energy is at the bottom of the hill.
Do robots have kinetic energy?
Yes, robots can have kinetic energy when they are in motion. Kinetic energy is the energy possessed by an object due to its motion, so when a robot is moving, it possesses kinetic energy like any other object in motion.
How fast can the fastest person in the world run in mph?
World records for the 100-meter dash are . . .
Men:
Usain Bolt, August 16, 2009, 9.58 seconds = 23.35 mph
Women:
Florence Griffith-Joyner, July 16, 1988, 10.49 seconds = 21.32 mph
What is the total potential and kinetic energy of all microscopic particles in an object?
The total potential energy of all microscopic particles in an object is due to the interatomic forces between them, which can be significant in solid and liquid states. The total kinetic energy of the particles is associated with their random motion, which increases with temperature. Both potential and kinetic energies contribute to the overall internal energy of the object.
How many mph is 5280 feet in 22 seconds?
To convert 5280 feet to miles, divide by 5280 to get 1 mile. Then, to find the speed in miles per hour, divide 1 mile by the time taken in hours (22 seconds converted to hours is 22/3600 = 0.00611 hours). Therefore, the speed is 1 mile / 0.00611 hours = 163.35 mph.
A speed vs. time graph could also be called a graph of acceleration. This graph will have a constant slope if the increase in speed is constant. It can also form a curved line if there is increasing or decreasing acceleration.
The total momentum before the collision is 80 kg * 70 km/hr + 120 kg * (-40 km/hr) = 5600 kgkm/hr - 4800 kgkm/hr = 800 kgkm/hr. The total mass after the collision is 80 kg + 120 kg = 200 kg. Therefore, their speed after the collision will be 800 kgkm/hr / 200 kg = 4 km/hr.
How does mass and velocity effect energy?
The kinetic energy of an object is directly proportional to its mass and also to the square of its velocity. This means that the higher the mass and the velocity of an object, the higher its kinetic energy will be. Therefore, doubling the mass of an object will double its kinetic energy, while doubling the velocity of an object will quadruple its kinetic energy.
What is the kinetic energy of an 8kg mass traveling at 5 meters per second?
Velocity of 4 meters per second??? I will assume so. ( need kilograms, so... 5 grams = 0.005 kilograms )
KE = 1/2mV2
KE = 1/2(0.005 kg)(4 m/s)2
= 0.04 Joules
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Were to did the first mach start?
The first match was believed to have started in ancient Greece, around the 8th century BC. It was probably a contest between two athletes in the city of Olympia during the Olympic Games.
When a body slides over a surface the kinetic friction and static friction related as?
Kinetic friction is the friction that applies when an object is moving; static friction is the friction that applies when the object is not moving.
Static friction must always be greater than, or equal to, kinetic friction.
Kinetic energy. I learned this from Berkley charter school Florida. By my 5th grade teacher Mr.vliet.
What speed are you travelling if you cover 110 miles in 100 minutes?
Then your speed is precisely (70 miles per 200 minutes).
If you do the division of (70/200), you find the more familiar unit rate:
(70 miles / 200 minutes) = 0.35 mile/minute = 21 miles/hour .
What do slopes of straight lines on a position vs time graph mean?
The slope of a straight line on a position vs. time graph represents the object's velocity. A steeper slope indicates a faster velocity, while a shallower slope indicates a slower velocity. The slope can be positive for motion in the positive direction and negative for motion in the negative direction.
The increased damage when two bodies collide head-on is due to the momentum of the objects, which is the product of their mass and velocity. When two bodies collide from opposite directions, their momentums add up, resulting in a greater force of impact compared to collisions at other angles where momentums may partially cancel out.
What is the area of a position time graph?
The area under a position-time graph represents the displacement of an object. It is calculated by finding the area between the curve of the graph and the time axis. The units of the area will be in distance units (e.g., meters, kilometers).
What in a position time graph a steep slope indicates?
I Dont know sombody help me on this an I'm on a quiz (:
Should 9 year old boys pitch almost 50 mph?
In the end, it's whatever is most comfortable to the pitcher.
If it is going to hurt someone (I.E., a catcher isn't as prepared, the pitcher doesn't have good aim, etc) he should not. If the pitcher can and can comfortably without hurting himself, go for it.
How do you tell if an energy transfer is kinetic or potential?
An energy transfer is kinetic if it involves movement of an object, like an object speeding up or slowing down. It is potential if it involves stored energy that can be released later, like an object held at a height that can fall due to gravity.
Before a yo yo is released, it has maximum potential energy and zero kinetic energy. As the yo yo goes down the string, its kinetic energy increases and it potential energy decreases. When the yo yo reaches the bottom of the string it has maximum kinetic energy and zero potential energy. As the yo yo goes back up the string, its kinetic energy decreases and potential energy increases until the yo yo reaches the top of the string, at which point kinetic energy is zero and potential energy is at its maximum.