A bat produces a sound at 17,250Hz and wavelength 0.019m. What is
the speed of the sound?

Answer(b) both involve the use of levers;

It maybe because uranus is made of gas but uranus has a solid core in the middle

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.