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11. A motor spins a disk (Idisk = 24.2 kg*m2) with a torque of 39 N*m, and a 18 N frictional force acts on the disk at a radius of 1.3 m. Attached to the disk at a radius of 1.8 m is a 10 kg mass. What is the magnitude of the angular acceleration in rad/s2 of the system? 12. A 1.4-kg projectile is fired from level ground. The vertical component of the initial velocity is 83 m/s and...
1. A projectile is fired straight upward at 170 m/s near the surface of Planet X, which has no atmosphere and where the acceleration due to gravity is g = 5 m/s2. (a) What is the acceleration of the projectile halfway to the top of its trajectory? [1] (b) Is the projectile in equilibrium at the top of its trajectory? Explain. [1.5] (c) How fast is it moving at the instant it reaches the top of its trajectory? (0.5] (d)...
A cannonball is fired horizontally from the top of a cliff. The cannon is at height H = 70.0 m above ground level, and the ball is fired with initial horizontal speedv_0. Assume acceleration due to gravity to be g = 9.80 m/s^2.Assume that the cannon is fired at time t = 0 and that the cannonball hits the ground at time t_g. What is the y position of the cannonball at the time tg/2?I found it tg/2 to be...
If a projectile is fired with an initial velocity of vo meters per second at an angle a above the horizontal and air resistance is assumed to be negligible, then its position after t seconds is given by the parametric equations x = (vo cos(a)t y = (vo sin(a)t - +- 1012 where g is the acceleration due to gravity (9.8 m/s2). (Round your answers to the nearest whole number.) (a) If a gun is fired with a = 30°...
A.) In a fit, a toddler throws straight down his favorite 3 kg toy with an initial velocity of 2.5 m/s. What is the magnitude of the change in velocity of the toy from t = 0.24 seconds to t = 0.48 seconds? B.) A motor spins a disk (Idisk = 24.4 kg*m2) with a torque of 40 N*m, and a 19 N frictional force acts on the disk at a radius of 1.6 m. Attached to the disk at...
4. Use the velocity versus time v() graph below to answer the following questions: 20 m/s 10 m/s 10 s 20 s 30 s -10 m/sL a. What is the displacement between 0-10 seconds? b. What is the displacement between 0-35 seconds? c. What is the acceleration at t- 10 seconds?
4. Use the velocity versus time v(t) graph below to answer the following questions: Vx 20 m/s 10 m/s 10 s 20 s 30 s 10 m/s a. What is the displacement between 0-10 seconds? b. What is the displacement between 0-35 seconds? C. What is the acceleration at t = 10 seconds?
1. A 30 N force is directed at an angle of 50° W of N x-component: A. -19 N B. -23 N C. -36 N D. 19N E. 23 N y-component: A. -19 N B. -23N C. -36 N D. 19 N E. 23 N west. What is the train's average acceleration? A. 10 kmh2,W B. 43 km/h2, w с. 10 kmh?. E D. 43km/h, E E. 53kmh?, E 2. The velocity of a train is 80 km/h west. One...
(7-10) A golf ball is hit horizontally at 40 m/s off of a 100 m tall building (don't try this). The trajectory of the ball is shown. Use g = 10 m/s2 for this problem and neglect air resistance. 9. What speed is the ball traveling at after 3 seconds? a) 20 m/s b) 30 m/s c) 40 m/s d) 50 m/s e) 60 m/s 10. What is the magnitude of the ball's acceleration after 3 seconds? a) 0 m/s2...
please tell me the answer and tell me why you chose it please help me!! i would appreciate it This page LUNClusions on the back of C) 9.8 m/s o D) 10 miles per hour 18) Calculate the velocity acciate the velocity at time t=2s for a ball the A) 10.1 m/s B) -5.2 m/s C) 0.3 m/s D) 4.6 m/s straight up with an initial velocity of 15 m 19) A rock is tossed skyward at an angle of...