A boy walks away from a plane mirror at a speed of 3 ms-1...
A boy walks away from a plane mirror at a speed of 3 ms-1 in a direction normal to the surface of the mirror. At what speed is his image approaching him?
89.0ms-1
6.0ms-1
4.5ms-1
1.5ms-1
0.0ms-1
Correct answer is B
Velocity of image w.r.t boy = velocity of object - velocity of image
velocity w.r.t to boy = v - (-v)
=3.0 - (-3.0)
The image velocity is 6 m/s towards the boy.
Which of the following is not an evidence of the particle nature of matter? ...
The diagram above shows two capacitors P and Q of capacitance 2μF and 4μF respectively connect...
A boy cycles continuously through a distance of 1.0 km in 5 minutes. Calculate his average speed...