Answer:
1) force = 8.4 N
2) acceleration = 1 m/s^-2
Explanation:
I've attached the working
Diffraction equation applies in this case:
d*Sin x = m*wavelength, where d = spacing of lines, x = angle = 39.5°, m = order of maximum = 2
Substituting;
d* Sin 39.5 = 2*600*10^-9
d = (2*600*10^-9)/Sin 39.5 = 1.88656*10^-6 m
In 1 mm (or 0.001 m), the number of lines is given as;
Number of lines = 0.001/d = 0.001/(1.88656*10^-6) = 530.065 ≈ 530 lines
Energy = force x distance
600 J = force x 3 m
force = 200 N
Work = force x distance
Work = 200 N x 3 m
Work = 600 J
Therefore work done = energy
The second sentence, beginning with the words "The graph shows...", is false, as far as we can tell.
Answer: a= -1.9 m/s²
Explanation: F = ma and a = F / m = 60 N / 32 kg = 1.875 m/s²
Because of law of action and reaction, wall applies same force to dino
In opposite direction and Dino is decelerating. Thus sign Is negative.
