A 4.0-kg mass, initially at rest on a horizontal frictionless surface, is struck by a 2.0-kg mass moving along the x axis with a speed of 8.0 m/s. After the collision, the 2.0-kg mass has a speed of 4.0 m/s at an angle of 37° from the positive x axis. What is the speed of the 4.0-kg mass after the collision
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- A 4.00 kg mass (mass 1) moves to the right with a speed of 3.00 m/s and collides with a 2.50 kg mass (mass 2) moving to the left with a speed of 1.50 m/s. Assuming the col- lision is elastic, what are the velocities of the first and second masses following the collision? A. mass 1: 2.01 m/s to the right, mass 2: 1.43 m/s to the right B. mass 1: -0.46 m/s, mass 2: 4.04 m/s to the right C. mass 1: -1.05 m/s to the left, mass 2: 2.05 m/s to the right D. mass 1: 1.81 m/s to the right, mass 2: 1.24 m/s to the rightThree children are standing together on a totally frictionless frozen pond. However, their combined mass of 130 kg is starting make the ice crack. They push against each other in an attempt to escape to the edge of the pond. Child 1 has a mass of 50 kg and ends up moving north at 4 m/s. Child 2 has a mass of 30 kg and ends up moving east at 5 m/s. What is the speed and direction of child 3?A 1.0 [kg] ball moving east collides head-on with a 2.0 [kg] ball that is also moving east with speed 2.0 [m/s]. What is the initial speed of the 1.0 [kg] ball if the final momenta of the two balls after the collision is 7.0 [kg m/s] East?
- A 2.2 kg block with a speed of 5.4 m/s collides with a 4.4 kg block that has a speed of 3.6 m/s in the same direction. After the collision, the 4.4 kg block is observed to be traveling in the original direction with a speed of 4.5 m/s. (a) What is the velocity of the 2.2 kg block immediately after the collision? (b) By how much does the total kinetic energy of the system of two blocks change because of the collision? (c) Suppose, instead, that the 4.4 kg block ends up with a speed of 7.2 m/s. What then is the change in the total kinetic energy?Two small steel balls A and B have mass 0.6 kg and 0.2 kg respectively. They are moving towards each other in opposite directions on a smooth horizontal table when they collide directly. Immediately before the collision, the speed of A is 8 m/s and the speed of B is2 m/s. Immediately after the collision, the direction of motion of A is unchanged and the speed of B is twice the speed of A. Find (a) The speed of A immediately after the collision, (b) The magnitude of the impulse exerted on B in the collisionYou have two identical cars of mass 1,662 kg. Initially, one car is moving to the right with a speed of 11 m/s, and the other is at rest. After the cars collide, you observe that the car that was moving is now at rest. What is the speed of the other car after the collision (in m/s)? Your Answer: Answer
- Problem 1: Two billiard balls with the same mass m move towards one another. Ball one moves in the positive x-direction with a speed of v11, and ball two moves in the negative x-direction with a speed of v2i. The two balls collide elastically, and both balls change direction after the collision. Vli If the initial speeds of the balls were vii = 2.0 m/s and v2i = 1.0 m/s, what would be the final speed and direction of ball two, v2f, in meters per second? Ov2f = 0 m/s. Ov2f = 2.0 m/s, in the negative x-direction. Ov2f = 2.0 m/s, in the positive x-direction. Ov2f = 1.0 m/s, in the positive x-direction. Ov2f = 1.0 m/s, in the negative x-direction.A car of mass 1000.0 kg moving at 20.0 m/s collides with a 5000.0 kg truck at the initial velocity of 10.0 m/s. After the collision, the car stops. Neglecting friction, what is the velocity of the truck after the collision? 20 m/s 10 m/s 8.0 m/s 12 m/s 10.0 m/s 14 m/sBox 1 is sitting at rest. Box 2 is moving to the left when it collides elastically with Box 1 (see figure). The surface is frictionless. Take the right to be the positive x-direction.The mass of Box 1 is 3.80 kg. The mass of Box 2 is 5.20 kg. The speed of Box 2 is 1.30 m/s before the collision.What is the velocity of Box 1 after the collision?
- Two 500 g blocks of wood are 2.0 m apart on a frictionless table. A 11 g bullet is fired at 450 m/s toward the blocks. It passes all the way through the first block, then embeds itself in the second block. The speed of the first block immediately afterward is 5.6 m/s. What is the speed of the second block after the bullet stops? Express your answer to two significant figures and include the appropriate units. V= μA Value m S ?Can you help me with this physics problem? A 0.35 kg projectile is moving in the negative y direction at a speed of 55 m/s. It collides and embeds in a 7.2 kg mass moving in the positive x direction with a speed of 5.1 m/s. What is the final velocity of the two masses? What fraction of energy was lost in this collision using Kinetic energy with this formula (Ki-Kf)/KiTwo identical 1350-kg automobiles A and B are at rest with their brakes released when B is struck by a 5600-kg truck C which is moving to the left at 8 km/h. A second collision then occurs when B strikes A. Assuming the first collision is perfectly plastic and the second collision is perfectly elastic, determine the velocities of the three vehicles just after the second collision. The velocity of car A is VA = km/hr + km/hr +. The velocity of car B is vg= The velocity of truck C is vc= km/hr ←.