A non-uniform rod XY of mass 40 kg and length 5.0 m lines on the horizontal ground. Its centre of gravity is 2.0 metres from the end X .Calculate the vertical Force P that will just be sufficient to lift the end Y from the ground. Why would the force P, is applied at the end X not be sufficient to lift the end X from the ground? (g=10.0 ms^-2)

-a plank XY 3.0m long weighing 20 kg and with its centre of gravity 2.0m from the end A carries a load mass 10 kg at the end A. It rests on two support at C and D.

a)Compute the values of the reaction forces R1 R2 at C and D.

b) How far from D ,and on which side of it must the mass of 24 kg placed on the plank so as to make the reactions equal ? ,What are their values.

c)Without this 24kg ,what vertical Force applied at we will just leave the plank clear of D? What is then the reaction at C?

Date chapter motion and speed review part a. vocabulary review directions: write the terms that match each description below in thes complete the sentence in number 13. ich each description below in the spaces provided. the boxed letters will 1. equal forces acting in opposite directions (2 words) 2. occurs when an object's velocity decreases (2 words) 3. sum of all forces acting on an object (2 words) 4. total distance divided by total time (2 words) 5. name for the slant of a line on a graph 6. distance divided by time 7. a push or a pull exerted on a body or object 8. distance and direction of an object from its starting point 9. tendency to resist change in motion 10. measure of how far an object has moved 11. speed and direction of motion 12. rate of change of position at a specific point in time (2 words) 13. the rate of change in velocity is called motion and spe

You carry a 7.0-kg bag of groceries 1.2 m above the ground at constant speed across a 2.7m room. how much work do you do on the bag in the process? (a) 157j (b) 0.00j (c) 185j (d) 82j

Which are examples of projectile motion? choose all that apply a. a soccer ball rolling across the ground in the northeast direction b. a car turning a corner, so it is heading south c. a javelin flying through the air d. a tennis ball lobbed over the net