e as shown. The hills have identical circular tops, and the block does not fly off any hill. (a) Which hill is the first hill that the block cannot cross? (b) What does the block do after failing to cross that hill? On which hilltop is (c) the centripetal acceleration of the block greatest and (d) the normal force on the

A student on the ground fires a pebble from a catapult with a velocity of 30 m/s at an angle of 30° above the horizontal.  If the pebble’s flight is interrupted by a vertical wall 12 m away from the student, at what height above the ground does the pebble hit the wall?

ASK TOUR TEACHER PRACTICE ANOTHER As shown in the figure below, cars #1 and #2 are sliding across a horizontal frictionless surface. The cars are equipped with a coupling arrangement similar to the one on railroad cars. Car #1 overtakes car #2 and they have a totally inelastic collision and become coupled together. You know the mass of each car; m₁ = 13.5 kg and m₂ = 45.0 kg. In addition, you are provided with the following graph, which shows the momentum of car #1 before, during and after the collision. p (kg. m/s) 100 40 Determine the velocity (in m/s) of car #2 before the collision. t(s)

1 Problem During a particularly snowy winter in Charlotte, a child of mass m slides down a ramp starting at rest from point A and encounters the melted grassy area at B before coming to a full stop at C. Assume the ice is frictionless. The height of point A is hĄ and the distance between B and C is L. What is the coefficient of friction of the grass, k? Assume that g = 9.81 m/s², ha = 5 m, m = 20 kg, and L = 10 m. hA P JA Ice B Grass L C

The tank is to be placed on a hill that is 1 km high above the ground. The enemy’s base is located at a horizontal distance of 10 km away and it is in a valley 0.5 km below the ground. Air resistance is neglected. Gravitational acceleration is constant and equal to 9.8?/?2 downwards. If the bomb is to be fired perfectly horizontally, what should the launching speed of the bomb be in order to hit the target? What is the duration it would take the bomb to hit the target? Find x(t) and y(t). Consider the initial location of the tank to be (0, 1 km)? Draw the trajectory of the bomb (x and y coordinates). Indicate clearly the value of x (horizontal displacement) when the bomb reaches the ground level. 5.     Draw the (?), ??(?), and ??(?) vertical above each other. Indicate key values on the graphs such as the start, the end, the maximum, the minimum and the x and y intercepts. PART 4 and 5 PLEASE.

C and D please

Equations of Dependent Motion: Rectangular Coordinates Learning Goal: The blocks A and B shown are initially at rest and have masses of mA = 225 kg and mp 117 kg Neglect the mass of the rope and pulley system and assume block B moves only in the vertical direction, parallel to the y-axis. Neglect the effects of friction. (Figure 1) Figure C 99°F Sunny B 1 of 1 ‒‒ Part A - Acceleration of Block B If the blocks are released from rest, determine the magnitude of the acceleration of block B Express your answer to three significant figures and include the appropriate units. ►View Available Hint(s) aB = Submit Value Part B Acceleration of Block A QA 5 a Value If the blocks are released from rest, determine the magnitude of the acceleration of block A. Express your answer to three significant figures and include the appropriate units. View Available Hint(s) i Units Units ? ?

I Review I Constants While a roofer is working on a roof that slants at 37.0° above the horizontal, he accidentally nudges his 88.0 N toolbox, causing it to start sliding downward, starting from rest. Part A If it starts 4.00 m from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 20.0 N? Express your answer in meters per second. V = m/s Submit Request Answer Provide Feedback Next >