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3 years ago

The source of the centripetal force that arises when a runner rounds a curve on a track is _____.

2 answers:

5 0

while taking a turn on a track, the track provides the frictional force acting towards the center of the curve. we know that to move in a curve, centripetal force is required. here since the frictional force acts towards the center, it provides the necessary centripetal force to move in circle. hence the correct choice is

friction

mel-nik [20]3 years ago

3 0

It's actually Friction.

I just did the test and got it right.

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A magnetic field is used to suspend a wire of mass 0.05 kgkg and length 0.16 mm . The wire is carrying a current of 11 AA . What

pochemuha

Answer:

$B=0.27840\ T$

Explanation:

Given:

mass of the wire, $m=0.05\ kg$

length of the wire, $L=0.16\ m$

current in the wire, $I=11\ A$

Now form the Lorentz force we know that every current carrying wire experiences a magnetic force on it due to the magnetic field components perpendicular to it.

Mathematically given as:

$F=I.L\times B$

$m.g=I.L\times B$

here: we nee to balance the gravitational force on the mass.

$B=$ magnetic field

$0.05\times 9.8=11\times 0.16\times B$

$B=0.27840\ T$

This magnetic field must be perpendicular to the direction of current in the wire and the these two directional quantities must lie in a plane normal to the direction of gravity according to the Fleming's left hand rule.

7 0

3 years ago

Why does moon appear to have alot of phases

Bingel [31]

It depends on the angle of the earth, and our point of view. A full moon would occur if we were to be right in front of it.

4 0

3 years ago

Why are the meters squared in the formula to calculate acceleration?

lianna [129]

Answer:

During acceleration, you are moving across a distance over a time, but also increasing how fast we are doing it. Therefore, it means by how many meters per second the velocity changes every second

Explanation:

8 0

4 years ago

A cannon is shot from a boat at 185 m/s at a 52.2 angle. How far away does it land?

PilotLPTM [1.2K]

Answer:

3380 m

Explanation:

3 0

2 years ago

How much force is needed to accelerates at a rate of 12.5 m/s after a force of 24N is applied ?

Artist 52 [7]

Answer:

F = ma so 12.5 * 24 is answer

Explanation:

4 0

4 years ago