1998 AP Physics C Mech

1998 AP Physics C Mech - 1998 Mech 1. A force F is exerted...

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1998 Mech 1. A force F is exerted by a broom handle on the head of the broom, which has a mass m. The handle is at an angle θ to the horizontal, as shown above. The work done by the force on the head of the broom as it moves a distance d across a horizontal floor is a. Fd sin θ b. Fd cos θ c. Fm cos θ d. Fm tan θ e. Fmd sin θ 2. The velocity of a projectile at launch has a horizontal component v h and a vertical component v v . Air resistance is negligible. When the projectile is at the highest point of its trajectory, which of the following show the vertical and horizontal components of its velocity and the vertical component of its acceleration? Vertical Horizontal Vertical Velocity Velocity Acceleration a. v v v h 0 b. v v 0 0 c. 0 v h 0 d. 0 0 g e. 0 v h g 3. The graph above shows the velocity v as a function of time t for an object moving in a straight line. Which of the following graphs shows the corresponding displacement x as a function of time t for the same time interval? 4. The position of a toy locomotive moving on a straight track along the x-axis is given by the equation x = t 3 - 6t 2 + 9t, where x is in meters and t is in seconds. The net force on the locomotive is equal to zero when t is equal to a. zero b. 2 s c. 3 s d. 4 s e. 5 s 5. A system of two wheels fixed to each other is free to rotate about a frictionless axis through the common center of the wheels and perpendicular to the page. Four forces are exerted tangentially to the rims of the wheels, as shown above. The magnitude of the net torque on the system about the axis is a. zero b. FR c. 2FR d. 5FR e. 14FR 6. A wheel of mass M and radius R rolls on a level surface without slipping. If the angular velocity of the wheel is ϖ , what is its linear momentum ? a. M ϖ R b. M ϖ 2 R c. M ϖ R 2 d. M ϖ 2 R 2 /2 e. Zero
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Questions 7 - 8 refer to a ball that is tossed straight up from the surface of a small, spherical asteroid with no atmosphere. The ball rises to a height equal to the asteroid's radius and then falls straight down toward the surface of the asteroid. 7. What forces, if any, act on the ball while it is on the way up? a. Only a decreasing gravitational force that acts downward b. Only an increasing gravitational force that acts downward c. Only a constant gravitational force that acts downward d. Both a constant gravitational force that acts downward and a decreasing force that acts upward e. No forces act on the ball. 8.
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1998 AP Physics C Mech - 1998 Mech 1. A force F is exerted...

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