When an object explodes into two fragments, the lighter one gets more kinetic energy than the heavier one. How can this be so, since both fragments are acted upon by the same force for the same amount of time during the explosion? (Hint: Does the force act over the same distance on each fragment?)
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When an object explodes into two fragments, the lighter one gets more kinetic energy than the heavier one. How can this be so, since both fragments are acted upon by the same force for the same amount of time during the explosion? (Hint: Does the force act over the same distance on each fragment?)
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- (2) An object initially at rest breaks into two pieces because of an explosion. One pieces has twice the kinetic energy of the other piece. (a) What is the ratio of the masses of the two pieces? (answer: 2) (b) Which piece has the larger mass? (answer: the piece with the smaller kinetic energy)Use the concepts of this chapter to describe what would happen if you fire a gun that has bullet ten times as massive as the gun. (Has to do with the conservation of momentum)III. Same lump is thrown towards the same wall (m=3kg, v=3m/s), but this time it bounces off the wall at speed of 2.00 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision.
- A blob of clay and a tennis ball are thrown at a partially open door in order to try to close it. Both have the same mass. The blob of clay sticks to the door while the tennis ball bounces off. Which one will be more likely to close the door or will they both close the door by the same amount?Is the following statement true? If not, why? Within the system, both the momentum and kinetic energy are conserved during each of the collisions ( spring-loaded elastic, hoop spring, and putty collisions).Let's assume a perfectly elastic collision between a golf club (mass of 250 gr) and a golf ball (mass of 46 gr). If the club hits the ball at a speed of 45 m/sec what will be the speed of the ball after the impact? What happens if the mass of the club is doubled?
- I. A lump of clay (m = 3.00 kg) is thrown towards a wall at speed v = 3.00 m/s. The lump sticks to the wall. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision. II. Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 3.00 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision. III. Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 2.00 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during…Answer question 8In a system with two moving objects, when a collision occurs between the objects: the total kinetic energy is always conserved. the total momentum is always conserved. neither the kinetic energy nor the momentum is conserved. the total kinetic energy and total momentum are always conserved.
- A 3 kg object is moving at 4 m/s. It collides inelastic collision with a 6 kg object moving to the left at 5.0 m/s. find their combined speed after the collision. (include their direction left or right)1. A lump of clay (m = 3.00 kg) is thrown towards a wall at speed v = 3.00 m/s. The lump sticks to the wall. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wallI. (c) Calculate percent of initial kinetic energy lost during this collision. II. Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 3.00 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision. III. Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 2.00 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost…A man who could only find a 75-kg blue rock nearby decides to drive a metal beach umbrella pole down into the soft sand of Galveston beach by dropping it straight down from a resting height of 2.3 meters. If the blue rock does not rebound off the pole just after contact (that means bouncing back and possibly hitting him in the head) then calculate the impulse the rock places on the umbrella pole. Assume the metal beach umbrella has a total mass of 175-kg