Problem 7: A watermelon is blown into three pieces by a large firecracker. Two pieces y of equal mass m fly away perpendicular to one another, one in the x direction another in the y direction. Both of these pieces fly away with a speed of V= 38 m/s. The third piece has three times the mass of the other two pieces. Randomized Variables V = 38 m/s V V, 3m Part (a) Write an expression for the speed of the larger piece, that is in terms of only the variable V. Expression : Select from the variables below to write your expression. Note that all variables may not be required. cos(0), n, sin(0), B, 0, a, d, g, h, i, j, k, m, t, V Part (b) What is the numeric value for the speed of the larger piece, in meters per second? Numeric : Anumeric value is expected and not an expression. Vs=_17.91 Part (c) At what angle does the largest piece travel with respect to the -y axis, in degrees? Numeric: Anumeric value is expected and not an expression.

Magnets are mounted on the sides of the carts facing each other so that the carts repel each other without touching during a collision. What is the speed of the 4.0 kg car after the collision? Your Answer: Answer -1.0 m/s -1.0 m/s 4.0kg 1.0 kg 4.0 kg units Before After 1.0 kg A Question 11 (4 points) Retake a Magnets are mounted on the sides of the carts facing each other so that the carts repel each other without touching during a collision. What is the speed of the 1.0 kg car after the collision? Your Answer: Answer -1.0m/s 4.0kg 4.0kg units Before After L0m/s 1.0kg 1.0kg A Question 12 (5 points) Retake quation Magnets are mounted on the sides of the carts facing each other so that the carts repel each other without touching during a collision. How much energy is lost in this collision? 1.0 m/s -1.0m/s 4.0kg 1.0kg 4.0kg Before Aller 1.0kg

Principle of __ provides a direct means of obtaining the particle’s final velocity after a specified time period when the particle’s initial velocity is known and the forces acting on the particle are either constant or can be expressed as functions of time. a. work and energy b. linear impulse and momentum c. angular impulse and momentum d. conservation of energy e. conservation of momentum

IM-6 Stanley pitches a 0.375kg baseball that travels with a speed of 27.0m/s to the right toward David. David swings the bat and hits the ball with a vertical force of 80.0N that lasts for 0.200s. Before impact: The hit: 27.0m/s 80.0N a) Sketch on your paper the vectors for: the momentum before impact PB, the change in momentum Ap, and the momentum after impact pA. Clearly label each vector as pB, pA, or Ap. b) Calculate the final momentum of the ball PA. c) Show on your figure the angle of the final momentum from the horizontal and find the value of that angle.