6) (From Page 11) If a small motor does 520 J of work to move a toy car 260
m, what force does it exert?
point
0 135,200 N
O 2N
O 05
O 780N -
7) (From Page 12) A block is sitting on a platform 20 m high. It weights 50
kg. How much Potential energy does it contain?
1000

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

The slope of a velocity time graph over any interval of time gives the during that interval

Infrared rays have a shorter wavelength than question 11 options: x-rays. ultraviolet rays. radio waves. gamma rays.