Answer:
Her angular momentum does not change.
Explanation:
Conservation of angular momentum: It states that there is no change in the angular momentum when no torque outside the system is applied to the body.
In the given problem, an ice skater spins her arm outstretched. She pulls her arms in towards her body.
The angular momentum of an ice skaters remains same as the there is no external torque applied on an ice skater. The initial angular momentum and the final angular momentum of the given system are same. Therefore, the angular momentum is conserved.
Therefore, her angular momentum does not change.
Answer:
#See solution for details.
Explanation:
Newton's Second law of motion states that :- the rate of change of momentum is directly proportional to the force applied on an object or system..
The force applied on an object of mass m is directly proportional to the product of mass and acceleration:
-Let be the initial momentum and be the final momentum.
#also let be the initial velocity and the final.
Momentum,:
#where k is the constant of proportionality. Given the direct proportion, k=1.
#The unit is in kgm/s but usually equated to N, 1kgm/s=1N
Answer:
The Andrews is A. 90km
Explanation: so far 1cm is equal to 45km on the map. That Means that a unit distance on the map is actually 4, 500, 000units (i.e 45 x 1000 x 100) in real life.
So if 1 cm represents 45km
2cm will represent 2 x 45km which gives 90km.
Answer:
His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. ... In reaction, a thrusting force is produced in the opposite direction.
Explanation: