Basic Physics Question #3. PLEASE HELP!!?!?!?

Question

Mike is cutting the grass using a human-powered lawn mower. He pushes the mower with a force of 45 N directed at an angle of 41° below the horizontal direction. Calculate the work that Mike does on the mower in pushing it 9.1 m across the yard.

Answer 1

Remember that work makes you mad. w = m * a * d

Also remember F = m * a

so, W = F * d as long as the force and the distance are in the same direction.

In your case, the 45 N force is at a 41° angle to the direction of travel.

So, force in the direction of travel is 45 cos (41°) = 34 N

So, W = 34 * 9.1 = 309.4, which, rounded to 2 significant figures, is 310 J

Answer 2

a million. I you specific he did no longer propose Newton. so some distance as i will keep in mind Galileo did no longer discover any forces. He dicovered gravity speeded up gadgets at equivalent costs regardless of their length or mass. He outfitted telescopes and reported the solar grew to become into on the midsection of our image voltaic equipment till the Catholic Church arrested him and compelled him to recant under threat of torture. before galileo there grew to become into an information of magnetism "loadstone", yet no longer electricity, gravity, nor the solid or vulnerable nuclear forces. in short, before Galileo's time, none. Galileo gave Newton the biggest contributions to his discovery of gravity and susequent mathmatical courting. 2. Momentum 3 F=ma, or a = F/m; you will be able to desire to be attentive to the mass of the motor vehicle, the mass of your pals and the stress they might prepare for my section and collectively to respond to precisley. Assuming the two are a similar length and potential and that the mass of the motor vehicle some distance exceeds their mass, the acceleration is effectively doubled.

Answer 3

Work=Force(multiply by)Distance moved in direction of force.
45N multiply by 9.1M=409.5J.Work is measured in Joules.