SUBJECT: PHYSICS 1. A lawn-mower is pushed with a force of 50N. If the angle between the handle of the mover and the ground is 30° i. Calculate the magnitude of the force that is pressing the lawn-mower directly into the ground.
ii. Calculate the magnitude of the effective force that moves the mower forward
iii. Why does the lawn-mower move forward and not downward into the ground?​

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.

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.