Question 4 a. A corn sheller moving at 30 kmh -- accelerates to a speed of 45 km - in 23 s. Find
the distance travelled in meters during the period of acceleration.
b. List the Four (4) mechanical properties of materials concerned with its behaviour under
the action of external forces and explain any two.
c. What is the classification of the two main types of wood?​

Which statement is true? a) the work done to lift an object 6 meters is greater than the gravitational potential energy it gains. b) the work required to push an object is less than the work required to pull an object the same distance. c) the work required to raise an object to a height is equal to the gravitational potential energy the object gains. d) the work done against gravity to lift an object straight up is greater than the work required to roll it up a ramp.