Class Management | Help Weeko Begin Date: 7/7/2023 12:01:00 AM -- Due Date: 7/18/2023 11:59:00 PM End Date: 8/10/2023 11:59:00 PM (6%) Problem 18: A block with mass m is released from rest at point A and slides down a curved slope to point B, then continues until it comes to rest at point C. The vertical height of A is h above point B, and point C is horizontal distance x from point B. The speed of the block at point B is VB. - 5. B x 4 50% Part (a) Write an expression for the work done by friction as the block slides from A to B. Your answer should be in terms of m, h, vg, and g (the acceleration due to gravity). Grade Summary W =1 Deductions 0% Potential 100% B LY ( ) 7 8 9 HOME Submissions b 4 5 6 Attempts remaining: 999 d g (0% per attempt) h k 1 2 3 detailed view m n P 0 S VB Vol Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: 1 Feedback: 0% deduction per feedback. 4 50% Part (b) Write an expression for the coefficient of kinetic friction between the block and the horizontal surface. Your answer should be in terms of x, VB, and g (the acceleration due to gravity). X FA FS 25+ F6 F8 F9 F10 F12 S & 5 6 8 9 O 3 O P E R D G H K B NtheExpertTA.com 1 Student: telghazi2101 @studentstcc.edu Class Management | Help Week6 Begin Date: 7/7/2023 12:01:00 AM -- Due Date: 7/18/2023 11:59:00 PM End Date: 8/10/2023 11:59:00 PM (4%) Problem 21: Suppose a 775-kg car climbs a 2.050 slope at a constant 30.5 m/s. 50% Part (a) What is the power output of the car P, in terms of the variables given in the problem statement, if the friction and wind resistance encountered is P = Grade Summary Deductions 0% Potential 100% cos(a) cos() cos ( 0 ) ( ) 7 8 9 Submissions sin(a) sin(Q) sin(0) 4 5 6 Attempts remaining: 999 (0% per attempt) a. B 1 2 3 detailed view d F + 0 m V VO Submit Hint I give up! Hints: 0% deduction per hint. Hints remaining: 1 Feedback: 0% deduction per feedback 4 50% Part (b) What is the power output of the car P, in watts, if F= 590 N? ed FB S & 6 8 E R P D G H K B NClass Management | Help Weeko Begin Date: 7/7/2023 12:01:00 AM -- Due Date: 7/18/2023 11:59:00 PM End Date: 8/10/2023 11:59:00 PM (5%) Problem 22: You give a crate of mass m = 1.00 kg an initial speed of vi = 4.00 m/s up an incline of 0 = 47.2 . The crate then slides along the incline, reaches a spring of spring constant k = 70.9 N/m , and compresses the spring by As = 15.0 cm before stopping. Vi A 25% Part (a) Assuming there is no friction, what is the distance, d, in meters, along the incline that the crate slides? Grade Summary d = m Deductions 0% Potential 100% sin() cos() tan() It . ( ) 7 8 9 Submissions cotan() E 4 5 6 Attempts remaining: 999 asin() acoso (0% per attempt) atan( ) acotan() sinh() 1 2 3 detailed view cosh( tanho cotanh() 0 O Degrees O Radians VO CLEAR Submit Hint I give up! Hints: 0% deduction per hint. Hints remaining: 2 Feedback: 0% deduction per feedback 25% Part (b) What distance, ds, in meters, had the crate moved when it just touched the spring? 4 25% Part (c) If there were friction between the crate and incline, which of the options below would be the correct equation for the magnitude of the kinetic friction force? A 25% Part (d) If there were friction between the crate and incline, what value of the coefficient of kinetic friction would stop the crate after it travels a distance, ds, stopping just before it begins to compress the spring? X' F4 2+ F6 FB F9 F10 F11 F12 % & 3 4 5 6 O E R D G H K B NClass Management | Help Week6 Begin Date: 7/7/2023 12:01:00 AM -- Due Date: 7/18/2023 11:59:00 PM End Date: 8/10/2023 11:59:00 PM (5%) Problem 23: An ideal pendulum of length L = 0. 75 m supports a mass of m = 0.5 kg. Initially the pendulum is lifted such that it makes an angle of 0 = 15 degrees with respect to the vertical. L m Otheexpertta.com ed ed 4 50% Part (a) When the pendulum is released from rest, what is the maximum speed, Vm in m/s, the mass reaches? Vm= Grade Summary ed Deductions 0% Potential 100% ted sin() cos() tan() TL ( ) 7 8 9 Submissions Attempts remaining: 999 ted cotan() asin( acos( E 4 5 6 (0% per attempt atan( acotan() sinh( 1 2 3 detailed view ted cosh( ) tanh() cotanh() + - 0 eted ODegrees O Radians VO eted Submit Hint I give up! eted Hints: 0% deduction per hint. Hints remaining: 3 Feedback: 0% deduction per feedback. 50% Part (b) Does increasing the mass at the end increase the maximum speed? leted F6 FB FO S & 3 4 5 6 8 E R P G H KClass Management | Help Weeko Begin Date: 7/7/2023 12:01:00 AM -- Due Date: 7/18/2023 11:59:00 PM End Date: 8/10/2023 11:59:00 PM (5%) Problem 24: A 0.25 kg ball is suspended from a light 1. I'm string as shown. The string makes an angle of 270 with the vertical. Let U = 0 when the ball is at its lowest point (0 = 0). L theexpertta.com A 50% Part (a) What is the gravitational potential energy, in joules, of the ball before it is released? U = Grade Summary Deductions 0% Potential 100% sin() cos() tan( ) IT ( ) 7 8 9 HOME Submissions cotan() asin() acos() E 4 5 6 Attempts remaining: 999 (0% per attempt) atan() acotan() sinh() 1 2 3 detailed view cosho tanh() cotanh( Degrees O Radians NO BAC CLEAR Submit Hint I give up! Hints: 0% deduction per hint. Hints remaining. 1 Feedback: 0% deduction per feedback. 4 50% Part (b) What will be the speed of the ball, in meters per second, when it reaches the bottom? ted X F4 2+ F6 F7 F8 F9 F10 F11 F12 To insert S & 3 5 6 8 9 O E R P D G H K B NClass Management | Help Veeko Begin Date: 7/7/2023 12:01:00 AM -- Due Date: 7/18/2023 11:59:00 PM End Date: 8/10/2023 11:59:00 PM (5%) Problem 17: A bullet whose mass is 6.21 g moves at a speed of 759 m/s. 4 50% Part (a) What is the kinetic energy, in joules, of the bullet? EK =| J sin() cos() tan() 7 8 9 cotan() asin( acos( E 4 5 6 atan() acotan() sinh() 1 2 3 cosh( tanh() cotanh() END Degrees Radians NO CLEAR Submit Hint I give up! Hints: 0% deduction per hint. Hints remaining. _ Feedback: 0% deduction per feedback. A 50% Part (b) What would be the kinetic energy, in joules, if the bullet were to instead move at half the given speed? O F3 X' F4 F5 F6 F7 F8 F9 F10 F11 S 5 8