Explanation:
When an object is moving in a circular path, the motion of the object is called uniform circular motion. The object moves under the action of centripetal acceleration. It is given by :
r is the radius of circular path
v is the speed of the object
In uniform circular motion, the object moves with constant speed. Also, the velocity of the object keeps on changing because it changes direction at every instant of time. Also, the object is accelerating due to change in velocity.
So, the correct options are (b) and (c).
The answer is prism i just took the test
Answer:
D) No, because of the way work is defined
Explanation:
There is no motion in the direction of the force, then no work is done by that force. ... But the work done on the box is zero since by moving in a straight line at constant speed, its energy is remaining the same.
Hope it helps
Please mark me as the brainliest
Thank you
Hi there!
1.
Since the two resistors are in series, we can simply add:
2.
In series, the potential difference of each resistor (lamp) ADDS UP. We can begin by finding the current through the circuit using Ohm's law:
Plug in the values:
Now,
we can use Ohm's law to find the individual voltage for each lamp.
20 Ohm lamp:
5 Ohm lamp:
3.
To solve, we can use the power equation.
Plug in the values for each.
20 Ohm lamp:
5 Ohm lamp:
Answer:
a). 
b). 
Explanation:
For the block that stays on the track, its maximal height is attained when all of the kinetic energy is converted to potential energy
a).
The height for the block on the longer track can by find using this equation:
Cancel the mass as a factor in each element in the equation
b).
The other lost some kinetic energy so, use a projectile motion to determine the total height for the other bock:
Solve to v'
