홍익대 일반물리학(대학물리학) 2022-1 중간 기출문제 (정답 포함)
1. 시험 정보
| 학교/과목 |
홍익대/일반물리학(대학물리학) |
| 시험명 |
2022-1 중간 |
| 교수명 |
- |
| 문항수/형식 |
선택형 10문제 |
| 정답/해설 |
✅ 있음 |
| 파일형식 |
- |
2. 출제 범위 & 키워드
일반물리학(역학) 전반을 다루는 기출로, 뉴턴 역학·에너지 보존·운동량·회전 운동·강체 평형 개념을 계산형·개념형 문제로 종합 평가
📚 키워드
-
가속 좌표계(줄 각도·가속도), 중력 퍼텐셜 에너지 변화, 운동량 보존·반동 속도, 토크 벡터(r×F), 회전관성·구름운동, 각속도·각운동량 단위, 미끄럼 vs 구름 운동 에너지 비교, 강체 질량분포, 지레 평형 조건
3. 기출 미리보기
|
1. Eunice dangles her watch from a thin piece of string while the jetliner she is in accelerates for takeoff. Estimate the acceleration for the takeoff of the aircraft if the string makes an angle of 25' with respect to the vertical.
|
4. 자료 보기
[기출 문제]
|
1. Eunice dangles her watch from a thin piece of string while the jetliner she is in accelerates for takeoff. Estimate the acceleration for the takeoff of the aircraft if the string makes an angle of 25' with respect to the vertical.
(a) g sin(theta) (b) g cos(theta) (c)g tan(theat) <-답
(d) g
2. A 50.0kg hiker starts at an elevation of 1000m and climbs to the top of a peak 2000m high. What is the hiker's change in potential energy? (use g=9.80km/s^2)
(a) 190J (b)196kJ (c)380kJ (d)490kJ <- 답
3. A 50kg archer stands at rest on fricationless ice and fires a 0.020-kg arrow horizontally at 80m/s. With what velocity does the archer move across the ice after firing the arrow?
(a) -0.040im/s (b)-0.032im/s <-답 (c) 0.040im/s (d)0.042im/s
4. A force F=(2.00i + 3.00j)N is applied to a rigid object that is pivoted about a fixed axis aligned along the z coordinate axis. The force is applied at a point at r = (4.00i + 5.00j)m relative to the axis. Find the torque t = r x F applied to the object
답 : 2.00k
5. A plain wedding band, a spherical marble, and a Duracell battery, labeled by 1,2 and 3 roll without slipping down an incline of verticle height H, all starting from rest at the same time. The moment of inertia of these objects ar I1 = MR^2, I2 = 0.4MR^2, I3 = 0.5MR^2. In what order do they reach the bottom of the incline?
답 : 2,3,1
6. Which one is correct for units of angular speed, moment of inertia, angular momentum, and Young's modulus?
답: rad/s;kg*m^2;kg*m^2/s;N/m^2
7. A smooth cube of mass m and edge length r slides with speed v on a horizontal surface with negligible friction. The cube then moves up a smooth incline that makes an angle theta. with the horizontal. Acylinder of mass m and radius r rolls without slipping with its center of mass moving with speed v and encounters an incline of the same angle of inclination but with sufficient friction that the cylinder continues to roll without slipping. Which object will go the smaller distance up the incline?
답: the cube.
8. In P7. find the difference between the maximum distances the objects travel up the incline.
답:v^2/(4gsin(theta))
9. A baseball bat of uniform density is cut at the location of the location of its center of mass as shown in Fig. Which piece has the smaller mass?
답: the piece on the left
10. A seesaw consisting of a uniform board of mass M and length L supports at rest a father and dauther with masses mf and md, respectively, as shown in Fig. The suppor is under the center of gravity of the board, the father is a distance d from the center, and the daughter is a distance L/2 from the center. Determine where the father should sit to balance the system at rest.
답: (md/mf)*(L/2)
|
[정답]
욕설/비하 발언
