- The diagram above shows the elliptical path described by a satellite about the earth. In which of the marked positions, A-D does the satellite experience the maximum acceleration?
Your answer:
B
all postions have the same accleration
A
D
C
- For question 1, which of the marked positions. A-D is the most work being done on the satellite?
Your answer:
B
C
D
all positions have the same work being done
A
- Many drivers education books provide tables which relate a car's braking distance to the speed of the car (see table above). Utilize what you have learned about the stopping distance-velocity relationship to determine the stopping distance at 30 mph (b in the diagram).
Your answer:
6.8 ft
120 ft
90 ft
108 ft
60 ft
- A motor develops power as shown in the graph above. The energy expended by the motor in the time interval between t=10 s and t=30 s is...
Your answer:
1.3 J
0.20 kJ
0.60 kJ
0.70 kJ
1.0 J
- A 6.0 kg block slides from point A down a frictionless curve to point B. After the block passes point B, a friction force opposes the motion of the block so that it comes to a stop 2.5 m from B. Calculate the coefficient of kinetic friction between the block and the surface after position B.....
Your answer:
2.5 N
Greater than 0.40
2.5
0.40
0.40 N
- A mass m=2.5 kg is sliding along a frictionless table with an intial speed v as shown in the figure above. It strikes a coiled spring that has a force constant k=500 N/m and compresses it a distance of -5 cm. The initial speed of the block was....
Your answer:
0.71 m/s
0.50 m/s
1.7 m/s
1.0 m/s
1.4 m/s
- You release an object from rest at high altitude. If air resistance is considered, the curve above that best represents the kinetic energy of the body as a function of the distance fallen is....
Your answer:
1
2
4
3
5
- In pushing a load, a woman exerts a force as given in the graph above. What was the total work done by the woman?
Your answer:
400 J
200 J
2000 J
500 J
1000 J
- Use the law of conservation of energy (assume no friction) to find the velocity of the 1000-kg roller coaster car at the top of the loop in the diagram above (E).
Your answer:
31.6 m/s
22.4 m/s
30 m/s
0 m/s
500 m/s
- Determine Li Ping Phar's (m=50 kg) speed at position D in the diagram above.
Your answer:
0 m/s
9.8 m/s
28.3 m/s
37.4 m/s
44.7 m/s
- In a phun physics demo, two identical balloons (A and B) are propelled across the room on horizontal guide wires. The motion diagrams (depicting the relative position of the balloons at time intervals of 0.05 seconds) for these two balloons are shown above. Which balloon (A or B) experiences the greatest impulse?
Your answer:
They both experience the same impulse
no answer
no answer
B
A
- While driving down the road, Anna Litical observed a bug striking the windshield of her car. Quite obviously, a case of Newton's third law of motion. The bug hit the windshield and the windshield hit the bug. Which of the two forces is greater: the force on the bug or the force on the windshield?
Your answer:
no answer
no answer
force on the bug
force on the car
they will receive the same force
- Which ball in the diagram above, A or B, receives the greatest impulse during its collision with the wall?
Your answer:
no answer
no answer
they receive the same impulse
A
B
- A 3000-kg truck moving with a velocity of 10 m/s hits a 1000-kg parked car. The impact causes the 1000-kg car to be set in motion at 15 m/s. Assuming that momentum is conserved during the collision, determine the velocity of the truck after the collision.
Your answer:
2.5 m/s
20 m/s
5.0 m/s
15 m/s
10.0 m/s
- A railroad diesel engine has four times the mass of a flatcar. If a diesel coasts at 5 km/hr into a flatcar that is initially at rest, how fast do the two coast if they couple together?
Your answer:
3 km/hr
5 km/hr
4 km/hr
2 km/hr
1 km/hr
- The graph above shows the force applied to a 3kg mass over time. What is the change in velocity of the mass?
Your answer:
24 m/s
36 m/s
12 m/s
72 m/s
6 m/s
- The graph above shows the momentum of a body as a function of time. The time at which the force acting on the body is greatest is...
Your answer:
1.5 s
2.5 s
4.0 s
5.0 s
0.5 s
- A bullet, m = 0.5 kg, traveling with a velocity of 100 m/s strikes and embeds itself in the bob of a ballistic pendulum, M = 9.50 kg. The combined masses rise to a height h = 1.28 m. The speed of the combined masses immediately following impact is....
Your answer:
10.0 m/s
9.10 m/s
5.00 m/s
5.26 m/s
22.3 m/s
- Two identical masses are hung on strings of the same length. one mass is released from a height h above its free-hanging position and strikes the second mass; the two stick together and move off. They rise to a height H given by...
Your answer:
none of these
h/2
h
h/4
3h/4
- The momentum vectors A1 and B1 of two bodies are shown before collision in the diagram above. After the collision, body A is at rest. The vector that correctly represents the momentum of body B after the collision is....
Your answer:
4
1
3
5
2