Question

give the correct answer ​

Answer 1

Answer:

45∘

Hence the angle of elevation of sun is 45∘

Answer 2

Answer:

c

Explanation:

f = mu*N

for static motion

friction=0.5*10*10

=50N

if F=45N Or 50 N block will not move

for F=60 N block will move

then friction f=muk*N

=0.4*10*10

=40N

net force =60-40

=20N

so

acceleration =20/10=f/m

=2m/s^2