2020-10-20 来源:ap.socool100.com
2015年AP力学(选择题+简答题)真题及答案下载(PDF)
以下为2015年AP力学选择题真题:
Questions 1-3
The graphs below show position x plotted as a function of time t for each of three objects constrained to move along a straight, level path.
1. In which of the graphs is the magnitude of the momentum of the object increasing?
(A) II only
(B) III only
(C) I and II
(D) I and III
(E) II and III
2. In which of the graphs does the object have a constant nonzero kinetic energy?
(A) I only
(B) II only
(C) III only
(D) I and II
(E) I and III
3. In which of the graphs is the net force on the object zero?
(A) I only
(B) III only
(C) I and II only
(D) II and III only
(E) I, II, and III
4. The coplanar forces F1,F2 , F3 , and F4 represented above can act on an object. If the object is initially at rest, which combination of the forces would result in static equilibrium?
(A) F1 and F3 only
(B) F1,F2 , and F4 only
(C) F2, F3 , and F4 only
(D) All four forces
(E) No combination of the forces would result in equilibrium.
5. A block of mass Mis being pulled to the right at a constant speed with a pull force Fpull that is at an angle of θ with respect to the horizontal, as shown in the figure above. The force of friction acting on the block has magnitude f What is the magnitude of Fpull ?
(A) f cosθ
(B) f sinθ
(C) f
(D) f /cosθ
(E) f /sinθ
余下2015年AP力学选择题真题及答案省略!
以下为2015年AP力学简答题真题:
Mech. 1.
A new sports car is undergoing acceleration tests to determine its specifications. The following data on speed v versus time t are recorded for the car as it accelerates from rest along a straight track.
(a) On the axes below, plot v as a function oft and sketch a curve that best represents the data.
(b) Answer each of the following for the time period t = 0s to t = 10s.
i. Does the speed of the car increase, decrease, or stay the same?
Increase Decrease Stay the same
Justify your answer.
ii. Does the acceleration of the car increase, decrease, or stay the same?
Increase Decrease Stay the same
Justify your answer.
(c) Explain how you would use your graph in part (a) to find the distance traveled by the car between t = 2s and t = 8s . The equation for the speed v of the car as a function of time t found from the graph is v(t) = -0.3t2+ 7t, where v is in meters per second and tis in seconds.
(d) Derive an expression for the acceleration of the car a(t) as a function of time t.
(e) Calculate the position of the car as a function of time, x (t) , assuming that the car starts from rest at the origin of a coordinate system.
(f) Calculate the distance traveled by the car between t = 2 s and t = 8 s .
余下2015年AP力学简答题真题及答案省略!
2015年AP力学(选择题+简答题)真题及答案下载(PDF),完整版,20元有偿!
微信扫码支付 |
支付宝扫码支付 |
资料下载说明 |
|