TOPIC 3: Vertical projectile motion in one dimension 1.
GRADE 12: WORKSHEET
A boy stands on the edge of a cliff. He throws a stone vertically upwards with an initial
velocity of 12 m. st. The stone strikes the ground below the cliff after 4 s. Ignore air
resistance.
1.1
What is the magnitude and direction of the acceleration of the stone:
1.1.1 when it is moving upwards?
1.1.2 when it reaches its maximum height?
1.1.3 when it is falling down?
1.2 At what time(s) does the stone have a speed of 3 m. s-1?
1.3 How long does the stone take to reach its maximum height?
1.4 Determine the height of the cliff.
In an experiment, a learner drops a brick A from a height of 8 m. After 0.6 s another
learner throws a second brick B downwards from the same height. Both bricks A and B,
hit the ground at the same time. Ignore the effects of friction and calculate the speed at
which brick B was thrown.
2.​

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

5submission this assignment is worth 20 points total. you are required to submit the following by next lab: 1. (3 points) determine the equation for the output angular velocity ω2 = θ˙ 2 as a function of θ1, ω1 = θ˙ 1 and α. you must show all your work to receive credit. 2. (2 points) use the result of problem#1 to plot ω2 over 0 ≤ θ1 ≤ 360deg with ω1 = 360deg/sec. do this for α = {10,30}deg. show the results on the same plot and properly label the axes, title, legend. for this you can use matlab or ms excel. 3. (3 points) determine the equation for the output angular acceleration ω˙ 2 and create a plot similar to the one in problem#2. 4. (10 points) submit plots of the results (ω2 and ω˙ 2) obtained from creo/mechanism and compare them to results of problem#2 and problem#3. note that you should do these comparisons for the two cases with α = {10,30}deg. 5. (2 points) provide a brief explanation of the results. did they match? what are the implications as misalignment angle increases?

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four