Question
explain the answers please
ect that han a smaller angular velocity btating object with a lorger aasgulns velocity 5. (T / F) The more fuel ..naller angular velocit yan gular vlocity will hwve·shorter penod than M. arns, the etor its chosge n velocity rocket burns, the greater its c Multiple choice Cirele the correcetoption (pont or euh aholey 1. Two pool balls collide and then mov ls collide and then move apart. In this isolated, elastic collision the momentum (is conserved/ m (is conservedmay or may not be conserved/ is not conserved) and the kinetic energy (is conserved/ may or may not be conserved/ is not conserved) 2. A baseball flies towards the ground. If the baseball hits the ground and sticks, the impuse on the ball from the ground is (larger than /equal to / smaller than) the impulse if the baseball hits the ground and bounces off. 3. You are in a boat that is three times your mass in the middle of a still lake. You start at one end of the boat and then walk to the other end of the boat. Relative to the surface of the lake, you travel(farther than / the same distance as / less distance than) the boat. 4. The moment of inertia about an axis through an object's center of mass ia about an axis through an object's center of mass is always (larger than/equal to / smaller than) the moment of inertia about a parallel axis whiv is not through the object's center of mass.
Explanation / Answer
1) In an elastic collision, both the momentum and the kinetic energy are conserved.
2) Impulse = Change in momentum of the ball
Change in momentum of the ball is more if the ball bounces after it hits the ground compared to when the ball sticks.
3) Linear momentum of the (boat + person) system is conserved along the surface.
Since the mass of the boat is three times the mass of the person, it will move one-third of the distance moved by the person.
4) The moment of inertia of an object is minimum about an axis passing through its centre of mass compared to any of the other parallel axes.
