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Kinematics
Kinematics is the study of how a body moves. This includes linear motion, angular motion, and rotational motion.
3,459 Questions
The total mechanical energy would be the sum of its potential and kinetic energy, which is 27 J in this case (15 J + 12 J). This total mechanical energy remains constant if no external forces, such as air resistance, are acting on the glass of milk during its fall.
How fast is the pace to run a half mile in 4 minutes 13 seconds?
The pace to run a half mile in 4 minutes 13 seconds is 7.12 (7.11462451) miles per hour.
To get a trailer up to a speed v in a time t, you would need to get it accelerating at a rate of v/t. From F=ma, the net force on the trailer to achieve this would have to be mv/t. First, you'll need to apply a force greater than the static frictional force to get the trailer moving - then to get the desired acceleration, you'd apply a force F = mv/t + Ff where Ff is the kinetic friction of the axel/tires. So, once you overcome the static friction the required force to achieve velocity v in time t would be: F = mv/t + frictional force
Can a single object have kinetic energy but zero momentum?
Yes. Kinetic energy is a scalar (non-directional) and momentum is a vector. That means if you have two or more objects in motion their kinetic energies always add. But their momentums must be combined using vector addition and you might get zero. The simple case is two identical masses moving with equal but opposite velocities. Their total momentum is zero because their directions of motion are opposite.
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Yes,
Take two objects of the same mass, A and B, whose velocities, VA and vb, are opposite
Ke = .5(m)(VA)^2 + .5(m)(vb)^2 =
Plug in some numbers, m = 1 kg, VA = 10 m/s, vb = -10 m/s
.5(1)(10)^2 + .5(1)(-10)^2 = 50 + 50 = 100 -- a positive number
momentum can be found using p = mva + mvb
so p = (1)(10) + (1)(-10) = 10 + -10 = 0
How many kilometers per hour would it be if you drove 66 meters in 3.7 seconds?
To convert meters per second to kilometers per hour, we first need to find the speed in m/s: (66 \text{ meters} \div 3.7 \text{ seconds} = 17.84 \text{ m/s}). Then, we convert m/s to km/h: (17.84 \text{ m/s} \times 3.6 = 64.22 \text{ km/h}).
What is the Top speed of a plasma rocket?
Theoretically approaching the speed of light if the supply of fuel is infinite. Speed would increase continually since the engine is continuously fired.There is no resistance to movement in space and the size of the rocket is not a limiting factor.
Ion drives are in their infancy.The European SMART satellite carried 60 Kg of Xenon gas which was accelerated through a jet nozzle by electricity derived from solar cells. It took 6 months to reach the moon because the jet was about the same force as blowing on your hand.
What variable does slope represent in a velocity vs time graph?
The Physical quantity that the slope of velocity time graph show is:
negative acceleration otherwise retardation.
If the velocity of the body is decreasing then the body is said to have negative acceleration (-ve) or retardation.
u>v
Before the shot, total momentum of the rifle/bullet system is zero. Momentum is conserved, so must total zero after the shot. Magnitude of momentum = m V (mass, speed); we'll take care of direction independently. Momentum of the rifle: m V = (3.8) x (2.4) = 9.12 kg-m/sec backwards. We need momentum of the bullet = 9.12 kg-m/sec forward m V = 9.12 ===> V = ( 9.12 / m ) = ( 9.12 / 0.013 ) = 701.54 m/s forward
The top speed is about mach 1.8 [1382.4 mph.]
The distance from New York to L.A. is about 3000 miles, which makes the best time about 2 1/2 hours.
They are not permitted to fly over about 650 mph. at air shows, but if they are over 10,000 feet, and not flying an airshow, they can go at top speed legally.
How fast is 269 km per hour into mph?
269 km per hour is approximately equal to 167.14 miles per hour (mph).
How is volleyball related to physics?
Volleyball involves many physics principles, such as projectile motion when the ball is served, gravity affecting the ball's trajectory, and momentum transfer during a spike. The angle and force at which the ball is hit, as well as friction with the air and the floor, all impact the game and players' strategies. Understanding physics can help players optimize their movements and techniques for better performance.
If you run a 5k in 25.48 minutes how fast is that per mile?
To convert minutes per kilometer to minutes per mile, use the conversion factor of 1.60934 (1 mile is approximately equal to 1.60934 kilometers).
25.48 minutes per 5 kilometers is approximately 8.18 minutes per mile.
Formulae to find velocity using pressure?
p=F/A,
where p=pressure,
f=force,
A=area
F=ma,
m=mass, a=acceleration
p=ma/A
a=v/t
p=(mv/t)/A
(pAt)/m=v
therefore,
v = (pAt)/m
When wax solidifies the kinetic energy of the particles in the wax...?
No change in kinetic energy and a decrease in potential energy. The potential energy becomes more negative as the bonds are formed during solidification (potential energy is zero when the object is a gas and reduces from that point as the state changes).
That distance is known as the total stopping distance, which consists of both the thinking distance (distance traveled while recognizing a hazard and reacting) and the braking distance (distance traveled from applying the brakes to coming to a complete stop). The total stopping distance can vary depending on factors such as speed, road conditions, and vehicle condition.
How fast is the thrust ssc in mph?
The ThrustSSC holds the current land speed record of 763.035 mph (1,227.986 km/h). It set this record on October 15, 1997, in Nevada's Black Rock Desert.
Working of screw gauge with pictures?
screw gauge, is a device incorporating a calibrated screw used widely for precise measurement of small distances in mechanical engineering and machining as well as most mechanical trades, along with other metrological instruments such as dial, vernier, and digital calipers.
The force that the ground exerts on the ball to stop it instantly is equal to the change in momentum of the ball over the time it takes to stop. This force will be greater than the force of gravity acting on the ball. Additionally, the force applied by the ground will need to overcome the force of gravity and provide an equal and opposite force to cancel out the ball's downward momentum.
Seadoo wave runner wont go over 10 mph?
There could be several reasons for this issue, such as a clogged fuel filter, a dirty carburetor, a fouled spark plug, or an engine problem. I recommend checking and addressing these potential problems to restore your Sea-Doo WaveRunner's performance. If issues persist, it may be best to consult a professional mechanic for further diagnosis and repairs.
Does pushing a pen off a desk converts potential energy to kinetic energy?
Yes, pushing a pen off a desk converts potential energy (stored energy due to gravity) to kinetic energy (energy of motion) as it falls towards the ground. This conversion happens as the pen loses height and gains speed.
How fast are girraffes in mph?
Giraffes can run at speeds of up to 35-40 miles per hour for short bursts. However, they typically maintain a more leisurely pace of around 10 miles per hour when roaming or grazing.
How do you make a simple physics projectile launcher?
To make a simple physics projectile launcher, you can use materials like a rubber band, a ruler, and a small plastic cup. Attach the rubber band to the ruler, pull it back, and place the cup at the end to hold the projectile. Release the ruler to launch the projectile forward, demonstrating the principles of projectile motion.
How does increasing the surface area of a solid reactant affect the energy of molecular collisions?
Reactions depend on molecular collisions. If a solid reactant is a solid, grinding it into smaller particles will increase the surface area. The more surface area, the faster the molecular collisions, which in turn increases the rate of reaction.
How many feet will you travel going 50 miles per hour?
50 miles per hour is 50 * 5280 (feet per mile) per hour = 264000 feet per hour and then, depending on how long a time period you're interested in...you could just divide the 264000 feet per hour by 60 to find the distance in feet per minute...then divide that again by 60 to find the distance in feet per second.
A car will travel 264000 feet per hour at 50 mph.
264000 feet per hour / 60 minutes per hour = 4400 feet per minute
264000 feet per hour / 3600 seconds per hour = 73.33 feet per second
What does the slope of a line on a velocity vs time graph represent?
The slope of the line of a speed-versus-time graph will give you acceleration. Remember that acceleration may be positive or negative, and in some cases, acceleration may be positive when speed remains the same.1 If the speed-time curve is linear or piecewise linear2, acceleration is, as stated above, merely the slope of the line segment. If, however, the graph is a smooth curve, then changing acceleration is represented. In other words, the rate of change of velocity -- delta-V over delta-T -- is not a constant. In that case, the slope of the line segment tangent to the curve at any given point is the acceleration at that point. Note 1: There is a discussion comment on this point.
Note 2: See the web link for an example of a graph that is piecewise linear.
