This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Physics 101 [l] The velocity of a runner as a v * function of tim e is given in the figure. Find the displacement of the runner during the time interval 5 m/s 0 < t < 20 s. [A] 45.0 m ([51)62.5 m * [C] 72.0m 5 s 1 0 s zos t [D] 78.5 m [2] A rocket blasts off and moves straight upward from the launch pad with constant acceleration. After 3.0 s the rocket is at the height of 77 m. W hat is its speed at this time? [A] 45 m/s (ft) 51 m/s [C] 55 m/s [D] 59 m/s [3] A person walks 10.0 m at an angle of 45 north of east, and then he walks 15.0 m west. Find the magnitude of the displacement of the person. ).6 m [B] 12.4 m [C] 13.6 m [D] none of above [4] A 10.0kg crate is being pulled along a horizontal smooth surface. The pulling force is 80.0 N and is directed 30.0 above the horizontal. W hat is the magnitude of the acceleration of the crate? .^ [A] 3.0 m /s 2 [B] 6.0 m /s 2 [C] 8.0 m /s 2 (jDjJnone of above [5] A 1500.0kg car is picking up speed as it goes around a horizontal curve whose radius is 200.0 m. The coefficient of static friction between the tires and the road is 0.400. At what speed will the car begin to skid sideways? [A] 18.5 m/s (fB])28.0 m/s [C] 45.9 m/s [D] 56.0 m/s [6] A 10.0N horizontal force pushes an object along a rough floor so that the object moves with a constant velocity of 4.00 m/s. How much power does this force deliver to the object? [A] 0 W [B] 2.50 W (0 )4 0 .0 W [D] 80.0 W [7] A 10kg stainless steel ball falling at a speed of 50 m/s enters a large tank of oil. After falling 10 m through the oil, the ball's speed has decreased to 30 m/s. The nonconservative work done on the ball by the friction force due to the oil is ([Ajj9 kJ [B] +9 kJ [C] 12 kJ [D] +12 kJ [8] A loaded gun is dropped onto a frozen lake. The gun fires, with the bullet traveling horizontally in the x direction. The bullet's mass is 0.020 kg, and its speed is 600 m/s. If the gun's mass is 1.2 kg, what is its final velocity? ~^ [A] 5 m/s y [B] 5 m/s y [C] 10 m/s x (jD plO m/s x [9] A wheel that is rotating at 33.3 rad/s is given an angular acceleration of 4.30 rad /s 2 . Through what angle has the wheel turned when its angular speed reaches 72.0 rad/s? [A] 83.2 rad [B] 226 rad /[S]>474 rad [D] 948 rad Physics 101 [10] The moment of inertia of a uniform rod about its center is given by I = ML 2 /12. What is the kinetic energy of a 1.20m rod with a mass of 0.900 kg rotating about its center at 3.6rad/s?...
View Full
Document
 Spring '08
 Ashkenkai
 Physics

Click to edit the document details