A positive charge Q is fixed in place on a frictionless ice rink. A positively charged...

A positive charge Q is fixed in place on a frictionless ice rink. A positively charged hockey puck is released on the ice nearby. What will be true about the motion of the hockey puck?

A) Its speed will be greatest immediately after it is released.

B) Its acceleration will be zero immediately after it is released.

C) As its distance from Q increases, its acceleration will increase.

D) As its distance from Q increases, its speed will decrease.

E) As its distance from Q increase, its speed will increase.

Solutions

Expert Solution

The nature of the charge on the puck and the fixed charge is the same. So, the force between them will be repulsive. As the puck moves away from the fixed charge its velocity will increase because the force of repulsion will be acting on the puck for quite a long time.

A) False, because the velocity of the puck will start increasing when it is released. The velocity will start increasing soon after it is released due to the acceleration generated by the repulsive forces.

B) False, The puck will have some initial acceleration, due to which it will attain a velocity in the beginning.

C) False, the force of repulsion will decreases with distance, so the acceleration will also decrease.

D) False, as the puck moves away from the charge Q, the repulsive forces on Q will decrease but it will still generate a positive acceleration which will increase the velocity of the puck.

E) True, the velocity of the puck will increase as it moves away from Q, the force of repulsion will decrease in magnitude, but would still be generating a positive acceleration which in turn will increase the velocity of the puck.

genius_generous answered 1 year ago

Next > < Previous

Related Solutions

Two point charges are fixed in place. The positive charge is +2q and the negative charge...

Two point charges are fixed in place. The positive charge is +2q and the negative charge is –q. On the line that passes through the charges, how many places are there at which the total potential is zero?

A positive charge q is fixed at the point x = 0, y = 0, and...

A positive charge q is fixed at the point x = 0, y = 0, and a negative charge -2q is fixed at the point x = a, y = 0. a) Derive an expression for the potential V at points on the x -axis as a function of the coordinate x . Take V to be zero at an infinite distance from the charges. (Express your answer in terms of the given quantities and appropriate constants). V(x) = b)...

There is a positively Q charged rod that is symmetrical along the y-axis with length W....

There is a positively Q charged rod that is symmetrical along the y-axis with length W. Show how to set up an integral for E at any point in 3-space.

At time t=0 a positively charged particle of mass m=5.95 g and charge q=10.8 μC is injected into the region of the uniform magnetic

At time t=0 a positively charged particle of mass m=5.95 g and charge q=10.8 μC is injected into the region of the uniform magnetic B=B k and electric E=−E k fields with the initial velocity v=v0 i. The magnitudes of the fields: B=0.43 T, E=722 V/m, and the initial speed v0=3.42 m/s are given. Find at what time t, the particle's speed would become equal to v(t)=4.14·v0: t =____ seconds.

There are two identical, positively charged conducting spheres fixed in space. The spheres are 43.0 cm...

There are two identical, positively charged conducting spheres fixed in space. The spheres are 43.0 cm apart (center to center) and repel each other with an electrostatic force of F1 = 0.0675 N. Then, a thin conducting wire connects the spheres, redistributing the charge on each sphere. When the wire is removed the spheres still repel but with a force of F2 = 0.100 N. Using this information, find the initial charge on each sphere, q1 and q2 if initially...

There are two identical, positively charged conducting spheres fixed in space. The spheres are 41.0 cm...

There are two identical, positively charged conducting spheres fixed in space. The spheres are 41.0 cm apart (center to center) and repel each other with an electrostatic force of F1 = 0.0600 N. Then, a thin conducting wire connects the spheres, redistributing the charge on each sphere. When the wire is removed the spheres still repel but with a force of F2 = 0.115 N. Using this information, find the initial charge on each sphere, q1 and q2 if initially...

There are two identical, positively charged conducting spheres fixed in space. The spheres are 34.8 cm...

There are two identical, positively charged conducting spheres fixed in space. The spheres are 34.8 cm apart (center to center) and repel each other with an electrostatic force of ?1=0.0765 N . A thin conducting wire connects the spheres, redistributing the charge on each sphere. When the wire is removed, the spheres still repel, but with a force of ?2=0.100 N . The Coulomb force constant is ?=1/(4??0)=8.99×109 N⋅m2/C2 . Using this information, find the initial charge on each sphere,...

There are two identical, positively charged conducting spheres fixed in space. The spheres are 39.6 cm39.6...

There are two identical, positively charged conducting spheres fixed in space. The spheres are 39.6 cm39.6 cm apart (center to center) and repel each other with an electrostatic force of ?1=0.0675 NF1=0.0675 N . A thin conducting wire connects the spheres, redistributing the charge on each sphere. When the wire is removed, the spheres still repel, but with a force of ?2=0.115 NF2=0.115 N . The Coulomb force constant is ?=1/(4??0)=8.99×109 N⋅m2/C2k=1/(4πϵ0)=8.99×109 N⋅m2/C2 . Using this information, find the initial...

There are two identical, positively charged conducting spheres fixed in space. The spheres are 38.2 cm38.2...

There are two identical, positively charged conducting spheres fixed in space. The spheres are 38.2 cm38.2 cm apart (center to center) and repel each other with an electrostatic force of ?1=0.0705 NF1=0.0705 N . A thin conducting wire connects the spheres, redistributing the charge on each sphere. When the wire is removed, the spheres still repel, but with a force of ?2=0.100 NF2=0.100 N . The Coulomb force constant is ?=1/(4??0)=8.99×109 N⋅m2/C2k=1/(4πϵ0)=8.99×109 N⋅m2/C2 .

A large negative charge −Q is located in the vicinity of points A and B. Suppose a positive charge +q is moved

A large negative charge −Q is located in the vicinity of points A and B. Suppose a positive charge +q is moved at constant speed from A to B by an external agent. Along which of the paths shown in the figure will the work done by the field be the greatest?(a) Path 1(b) Path 2(c) Path 3(d) Path 4(e) Work is the same along all four paths.

Subjects