2. An object of height 30cm is located at a distance 60cm from a pinhole camera. If the
distance of the pinhole from the screen is
20cm, the height of the image is

Can someone explain to me how to do this problem ?

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong

Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?