Physics, 31.07.2019 15:30 itsseand23

A0.55-kg ball, attached to the end of a horizontal cord, is revolved in a circle of radius 1.3 m on a frictionless horizontal surface. if the cord will break when the tension in it exceeds 75 n, what is the maximum speed the ball can have?

Answers: 1

Show answers

Answers

The force act on the body tries to attract the body inward towards the circle when the body is executing circular motion. The maximum value of speed will be 13.3 m/sec.

What is centripetal force?

The force operating on an object in curvilinear motion directed toward the axis of rotation or center of curvature is known as centripetal force.

Newton is the unit of centripetal force.

The centripetal force is always perpendicular to the direction of displacement of the item. The centripetal force of an item traveling on a circular route always works towards the center of the circle.

Due to rotation, the tension is act in the chord which is equal to the centripetal force act the ball.

$\rm T = F_c= \frac{mv^2}{r}$

Tension in the cord = T= 75 N

Centripetal force = F_c

Mass of the ball= m= 0.55 Kg

Linear speed =v= ?

The radius of the circle.= r = 1.3 m

T is the maximum tension before the cord breaks. So according to the condition the obtained velocity will be ;

$\rm v = \sqrt{\frac{Tr}{m} } \\\\ \rm v = \sqrt{\frac{75\times1.3}{0.55} }\\\\ \rm v = 13.3 \;m/sec$

Hence the maximum value of speed will be 13.3 m/sec.

To learn more about the centripetal force refer to the link;

link

Answer from: bm42400

The tension of the cord is the centripetal force that keeps the ball in circular motion:
$T=F_c = m \frac{v^2}{r}$
where T is the tension of the cord, F_c

is the centripetal force, m=0.55 Kg

is the mass of the ball, v its speed and r=1.3 m

is the radius of the circle.

The maximum allowed tension is T=75 N, before the cord breaks. Using this value inside the formula, we can find which is the maximum allowed value fot the speed v:
$v= \sqrt{ \frac{T r}{m} }= \sqrt{ \frac{(75 N)(1.3 m)}{(0.55 kg)} }=13.3 m/s$

Answer from: Quest

Answer (d) the universe had cooled enough for atoms to combine, protons and neutrons were too far apart to form nuclei;

Answer from: Quest

This kingdom is made up of species that do not really easily fit into other kingdoms such as the plant, animal,and fungi kingdom. some protists, such as the paramecium and amoeba, feed on other organisms while others such as algae are able to make their own food through the process of photosynthesis.

Another question on Physics

Physics, 22.06.2019 02:00

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

Answers: 1

Answer

Physics, 22.06.2019 08:20

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

Answers: 1

Answer

Physics, 22.06.2019 12:00

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?

Answers: 3

Answer

Physics, 22.06.2019 22:50

Cyclotrons are widely used in nuclear medicine for producing short-lived radioactive isotopes. these cyclotrons typically accelerate h- (the hydride ion, which has one proton and two electrons) to an energy of 5 mev to 20 mev. this ion has a mass very close to that of a proton because the electron mass is negligible—about 1 2000 of the proton’s mass. a typical magnetic field in such cyclotrons is 1.9 t. (a) what is the speed of a 5.0-mev h-? (b) if the h- has energy 5.0 mev and b = 1.9 t, what is the radius of this ion’s circular orbit?

Answers: 1

Answer

You know the right answer?

A0.55-kg ball, attached to the end of a horizontal cord, is revolved in a circle of radius 1.3 m on...

Questions