Vo = 5 m/s A B 50° 40° Vc -6° VB = 2.8 m/s VA
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The initial velocity of ball A is 5 m/s and then it hits balls B and C. Ball B is driven at 2.8 m/s in the direction shown. Ball A leaves at an angle of 6° to the center of the line. Find the velocities B and C. The masses are: ma= 0.5 kg, mb= 0.30 kg and mc= 0.35 kg.


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- The mass of a particular eagle is twice that of a hunted pigeon. Suppose the pigeon is flying north at v,2 = 16.1 m/s when the eagle swoops down, grabs the pigeon, and flies off. At the instant right before the attack, the eagle is flying toward the pigeon at an angle 0 = 49.5° below the horizontal and a speed of v;,1 = 33.3 m/s. What is the speed of the eagle immediately after it catches its prey? 'i,1 Vi2 speed: m/s What is the magnitude of the angle, measured from horizontal, at which the eagle is flying immediately after the strike? magnitude of angle:A 38.0 g balled is launched from ground level at an angle of 21.0° above the horizon. Its initial speed is 21.0 m/s. What is the value of px (in kg*m/s) an instant after the ball is launched? What is the value of py (in kg*m/s) an instant after the ball is launched?The mass of a particular eagle is twice that of a hunted pigeon. Suppose the pigeon is flying north at ??,2=17.5 m/s when the eagle swoops down, grabs the pigeon, and flies off. At the instant right before the attack, the eagle is flying toward the pigeon at an angle θ=47.1° below the horizontal and a speed of ??,1=42.1 m/s. What is the speed of the eagle immediately after it catches its prey? Speed: What is the magnitude of the angle, measured from horizontal, at which the eagle is flying immediately after the strike? Magnitude of angle:
- The mass of a particular eagle is twice that of a hunted pigeon. Suppose the pigeon is flying north at ??,2=16.1 m/s when the eagle swoops down, grabs the pigeon, and flies off. At the instant right before the attack, the eagle is flying toward the pigeon at an angle ?=39.9°below the horizontal and a speed of ??,1=40.5 m/s. What is the speed of the eagle immediately after it catches its prey? speed: m/s What is the magnitude of the angle, measured from horizontal, at which the eagle is flying immediately after the strike? magnitude of angle: °A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 99.5 kg. The mass of the rock is 0.277 kg. Initially the wagon is rolling forward at a speed of 0.488 m/s. Then the person throws the rock with a speed of 16.6 m/s. Both speeds are relative to the ground. Find the speed of the wagon after the rock is thrown (a) directly forward in one case and (b) directly backward in another. (a) vi (b) v-Three balls (B1, B2, and B3) are shot as projectiles with same initialspeed. The angle of the three launches are 30°, 45° and 60°, respectively.The three balls each have the same mass,but the radii of B1, B2, and B3 are 2, 4 and 8 cm, respectively.The ranges of the three projectiles are R1, R2 and R3, respectively.Find a relationship between the ranges. (a) R1 >R2 > R3 (b) R2 > R1 > R3 (c) R1 = R2 = R3 (d) R1 = R3 < R2
- A car (VW) and a truck (C) collide inelastically (stick together). The impact is made in a very short time of t= 0.1 s. Initial speed Vvw=40.0 m/s Cv=30 m/s Masses mvw = 900.0 kg mc = 2000.0 kg Find the final velocity of the vehicles. Find the average acceleration of each vehicle Find the average force over each vehicle. Find the initial kinetic energy. Find the final kinetic energy.Spheres A (mass 0.040 kg), B (mass 0.060 kg) and C (mass 0.080 kg) are approaching the origin as they slide on a frictionless air table. The initial velocities of A and B are v₁ = 1.60 m/s in the negative x direction and VB = 0.90 m/s at an angle 08 = 60°, as shown. All three spheres arrive at the origin at the same time and stick together. After the collision, the masses move at a speed of 0.50 m/s in the -x direction. UC y OB B UB VA A X C a. What is the x-component of the initial velocity of C? b. What is the y-component of the initial velocity of C? c. Calculate the change in mechanical energy of the collision. d. What type of collision is this? Explain.Identical twins, each with mass 62.0 kg, are on ice skates and at rest on a frozen lake, which may be taken as frictionless. Twin A is carrying a backpack of mass 12.0 kg. She throws it horizontally at 2.80 m/s to Twin B. Neglecting any gravity effects, what are the subsequent speeds of Twin A and Twin B? Twin A m/s Twin B m/s