Physics 30 – Final Review
1. Review the following graphs and familiarize yourself with what occurs on each.
2. Using figure #1, determine:
a) The position of the object at 4 hours, 12 hours and 18 hours.
2.5km, 12km, 4km
b) The time it takes to reach a position of 2km and 6km.
3h & 19h, 9.3h & 17h
c) The intervals where the functions velocity is positive, negative or
zero. “+” AB, CD “-“ EF “0” BC, DE
d) The velocity across each interval.
AB -> 0.6km/h, BC -> 0km/h, CD -> 2.3km/h,
DE -> 0km/h, EF -> -2km/h
Figure #1
3. Using figure #2 and assuming it is a velocity/time graph, determine:
a) The rate of acceleration along each interval.
#1 -> 0m/s2, #2 -> 0.67m/s2, #3 -> 0m/s2,
#4 -> 3m/s2, #5 -> 3m/s2, #6 -> -3m/s2
b) The distance and displacement of the object after 11 seconds.
Distance is 17.5m & Displacement is 0.5m
Figure #2
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   
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4. Solve a  b  c if a = 7.3N at N25°E, b = 11.8N at S47°W and c = 3.6N at N80°W. 9.1N at W5°S
5. A projectile is fired horizontally at 24.5m/s landing 76.4m from the base of the cliff. Determine the height of the
cliff. 47.7m
6. Calculate the potential energy in a spring whose constant is 7.0 x 10N/m, and is compressed 32.5cm. 3.7J
7. Calculate the velocity of a 0.25kg ball placed in front of the compressed spring in question #6 once the spring is
released and moves 18cm. 4.9m/s
8. A crane is using a total force of 8500N to lift an object with a mass of 260kg upwards.
a) Determine the net acceleration upwards of the object. 23m/s²
b) Determine the vertical height of the object after 3.2s assuming the object started at rest. 120m
9. Determine the force required to change a 0.50kg ball's velocity from 7.0m/s West to 9.3m/s West, if the force
acted for 2.9s over a distance of 3.8m. 0.40N
10. A truck travelling at 45km/h slows down to 15km/h in 4.0s. Determine the truck's deceleration. 2.1m/s²
5
-14
11. Determine the total negative charge an object with an excess of 2.9 x 10 electrons possess. 4.7 x 10 C
12. A ball is thrown straight downward at 8.0m/s from a height of 25.0m. Determine the velocity at which it strikes the
ground. 24m/s
13. Determine the acceleration of the system if m1 = 12kg, m2 = 15kg, µ = 0.24 and
θ  36. 0.099m/s2
14. Determine the acceleration of the system if m1 = 28kg, m2 = 25kg, m3 = 18kg
and µ = 0.12. 0.50m/s2
15. A force of 120.0N is applied to an object on a rough surface with a frictional force of 43N. Determine the object’s
mass if the acceleration was 2.4m/s². 32kg
16. An object starts from rest and accelerates at 1.7m/s² for 4.0s. Its velocity then remains constant at a certain
average velocity for 8.0s. Determine the distance to its starting point at this time. 68m
17. A pilot wishes to fly her plane at 190km/h along a course of 215°. However, to do so she must compensate for a
wind of 55km/h from a course of 348°. Determine the actual velocity she must fly at. 160km/h 230°
18. A 5.0 x 102g object is falling at 60.2m/s. Determine the object's velocity after it has fallen 1.8m. 7.0 x 10m/s
19. A ball is thrown vertically upward at 10.0m/s from a window and hits the ground 5.0s later. Determine the
window's vertical height. 73m
20. Determine the frictional force present if the coefficient of friction is 0.29 and the object's mass is 12.1kg. 34N
21. In the following decay series, determine the type of radiation emitted at each step. alpha, beta, alpha, beta,
alpha
235
231
231
227
227
223
U92
 Th90
 Pa91
 Ac89
 Th90
 Ra88
22. Determine the horizontal and vertical components of a 35N force acting along an angle of W75°N. vertical 34N &
horizontal -9.1N
23. A 1.6kg ball rolls down a frictionless ramp 1.3m high. Determine the speed when it reaches the bottom. 5.0m/s
24. Determine the depth of a well if an object takes 3.9s to reach the bottom. Assume it starts from rest. 75m
25. A projectile is propelled at 6.2m/s at an angle of 68° with the horizontal. Determine:
a) The maximum height the projectile will reach. 1.7m
b) The range of the object. 2.7m
26. Determine the horizontal force needed to give a 3.0kg ball with an initial velocity of 7.4m/s a final velocity of
15.1m/s after 1.5s if the surface's coefficient of friction is 0.28. 24N
27. Determine the power generated by a motor if it lifts a 3.4kg object 1.6m in 0.25s. 0.21kW
28. A 250g ball is struck by a bat with an impact that lasts for 0.015s. Determine the average force imparted by the
bat on the ball if the ball’s velocity changes from 55m/s east to 95m/s west. 2500N to the West
29. A 20.3N ball, initially at rest, is projected upward 1.7m with a force of 75N. Determine the ball's final velocity.
9.5m/s
30. A ball is thrown vertically upward with a velocity of 17m/s. Determine:
a) The time to reach maximum height. 1.7s
b) The maximum height. 15m