2. A ball (2 kg.) is thrown with a horizontal velocity v= 5 m/s. The coefficient of restitution is e=0.25. Note that, there is no friction force between the ball and the floor. 1.6 m • Find its velocity as a vector when hits the ground. • Apply coefficient of restitution formula in proper direction. Determine maximum height, h to which the ball rises after the first bounce.

answer Q 5

A stationary 2.17-kg object is struck by a stick. The object experiences a horizontal force given by F = at - bt 2, where t is the time in seconds from the instant the stick first contacts the object. If a = 1,500,000 N/s and b = 20,000,000 N/s?, what is the speed of the object just after it comes away from the stick at t = 2.55 x 103 s? %3D

• A 6kg block rests on a smooth table. It is connected by a string of negligible mass to a block hanging over the end of the table. Assuming motion is downwards, Find i. The acceleration of each block(2.5m/s²) ii. The tension in the connecting string(14.7N) iii. The position of mass of A after 0.4 second iv. The velocity of mass A at 0.4 seconds (0.98m/s)

2D Explosion For Cons of Mom.png At peak after explosion | V31 = (V3,)î %3D m3 = 0.3 kg At peak before explosion m2 0.7 kg (Vix)& V21 = (V2,)î m, = 1.0 kg %3D V = (50.0 m/s)v, V11 =-(10.0 m/s)f %3D 1,f 40° Launch A projectile of mass 2.0 kg is fired in the air as shown. The projectile is shown at three points in its trajectory. At the highest point in its flight, the projectile breaks into three parts with masses as shown and velocities immediately after the break-up. Calculate all of the missing velocities, in m/s: Initial velocity before break up (Vi,x): Blank 1 Velocity of mass 3 (V3, f): Blank 2 Velocity of mass 2 (v2,f): Blank 3 What is the range of mass 2 from the launch point (need to calculate the height of projectile before break up): Blank 4 Ignore any effects due to air resistance and enter all answers to ONE DECIMAL PLACE, regardless of sig fig rules. Blank 1 Add your answer Blank 2 Add your answer Blank 3 Add your answer Blank 4 Add your answer

Problem 6: A4.8 • 105-kg rocket is accelerating straight up. Its engines produce 1.35 • 107 N of thrust, and air resistance is 4.7. 106 N. Randomized Variables m = 4.8. 105-kg f=1.35.107 N fr=4.7.106 N. What is the rocket's acceleration, using a coordinate system where up is positive? a = sin() cos() cotan() asin() atan() acotan() cosh() tanh() O Degrees tan() J ( acos() E M sinh() / cotanh() Radians * 7 4 1 - 8 9 5 6 2 3 + 0 VO BACKSPACE HOME END DEL CLEAR

Problem 4.17 7 of 11 Can cars "stop on a dime"? Constants Part A Calculate the acceleration ofa 1200 kg car if it can stop from 43 km/h on a dime (diameter = 1.7 cm.) Express your answer to two significant figures and include the appropriate units. HA als Value Units a = Proctor DeguestAncuer - 8:36 hp L7 8.