EF 151 – Physics for Engineers
2017
Lab 3.6 – Review
1. As a team, make a list of the major topics that were covered during Module 3. Write out a sentence to
describe the concept as well as the equation(s) associated with this concept.
2. As a team, look at the problems listed for this review and identify the concept(s) that should be applied
to solve the problem. Do not actually solve at this point!
3. Rate your confidence level (1-10, 1 being low and 10 being high) on your ability to solve each
problem.
4. Work as a team to solve each problem listed on the review.
5. Did your confidence level match your actually ability to solve each problem? Based on confidence
level and performance, which concepts do you need to focus on for exam review?
Topics Covered in Module 3:
A.
Janet pushes on a 1745 kg car with a constant force of 611 N at an angle of 23° above the horizontal. If the
car starts from rest, how far has it moved when its velocity is 5.5 m/s?
Concept: ________________________________
Confidence: 1 2 3 4 5 6 7 8 9 10
A 2700 lb roller coaster has a speed of 19 ft/sec at a point 84 ft above the ground. The coaster starts down a
hill and passes a point 10 ft above the ground with a speed of 66 ft/sec. Determine the amount of energy
B. the roller coaster lost between the two points.
Concept: ________________________________
Confidence: 1 2 3 4 5 6 7 8 9 10
EF 151 – Physics for Engineers
2017
An object starts from rest and travels in a straight line
on a horizontal surface. A varying force (shown above,
Fmax= 14 N) is applied parallel to the direction of
motion. After traveling 12 m, the object's speed is 5.70
m/s. What is the mass of the object?
C.
Concept: __________________________________
D.
Confidence: 1 2 3 4 5 6 7 8 9 10
An 89 HP crane that is 74 % efficient is used to lift a 4700 lb weight at a constant speed. How long does it
take the crane to lift the weight 26 ft?
Concept: ________________________________
Confidence: 1 2 3 4 5 6 7 8 9 10
A 10 lb car is on a straight, horizontal, frictionless track. Three forces, (30 î + -50 ĵ) , (20 î + 40 ĵ) , (-10 î +
15 ĵ) lb and act on the car so as it travels along the track through a displacement of (10 î) ft. What is the
E. total work done on the car by these three forces?
Concept: ________________________________
Confidence: 1 2 3 4 5 6 7 8 9 10
A 95 kg model train engine is moving at +3.7 m/s when it collides with a 47 kg car that is moving at +2.6
m/s. They then collide with a 61 kg stationary caboose. Determine the final velocity of the three cars if all
F. collisions are perfectly inelastic.
Concept: ________________________________
Confidence: 1 2 3 4 5 6 7 8 9 10
A 45 kg object is moving at -6.0 m/s in the x direction when the
force shown in the graph (Fmax = 100 N, Tmax = 10 sec) is
applied to the object in the positive x direction. Determine the
velocity of the object at t= 8.0 sec.
G.
Concept: ________________________________
Confidence: 1 2 3 4 5 6 7 8 9 10
A 4.0 kg disc is sliding on a smooth horizontal surface at 2.0 m/s. It collides head on with a box that is
initially at rest. The coefficient of restitution is 0.4. Determine the mass of the box so the disc does not
H. move after the collision.
Concept: ________________________________
I.
Confidence: 1 2 3 4 5 6 7 8 9 10
Rick Barnes throws a 12 lb bowling ball such that it strikes the floor with a velocity angle of 48 ° from the
horizontal with a speed of 27 ft/sec. If the coefficient of restitution between the ball and the floor is 0.19,
what is the angle between the velocity of the ball and the floor immediately after the bounce?
Concept: ________________________________
Confidence: 1 2 3 4 5 6 7 8 9 10