Force and Perfectly Elastic Question Essay example

The ball now has kinetic energy. Kinetic energy like momentum in that it comes from the mass of the object and its velocity. Kinetic energy was transferred from the plunger to the ball just like momentum was but only if the collision was elastic. During and elastic collision kinetic energy is conserved. The balls kinetic energy is half of its momentum squared. This means the balls momentum is its mass multiplied by velocity, and then it is squared and divided by two. If the velocity or speed of the ball is reduced by one half then the overall kinetic energy is reduced by a factor of four (Kirkpatrick and Wheeler p.106)

The initial examples of use of force continuum were developed in the 1980s and early

1. Find the westward component of a resultant vector 85.42 unit, 23º W of N.

4. Rowing full speed is putting maximum demands on Jim's muscles. What metabolic process is providing most of the energy for Jim’s muscles at this point and why do Jim's muscles feel like they are burning? (5 points)

2. The ball contains kinetic energy while in motion near the bottom of its path.

11) When energy was studied earlier in the year, a connection was found between kinetic energy, potential energy, positive work, and negative work. What is the connection?

1) An object moves 15.0 m north and then 11.0 m south. Find both the distance traveled and the magnitude of the displacement vector.

If the resultant net force acting on the cart increases and total mass remains constant, than the acceleration will increase proportionally because Newton’s second law of motion states that acceleration is equal to the net force over the mass of the system; this demonstrates a directly proportional relationship between acceleration and net force because when acceleration increases, so does net force (Newton’s second law).

12. Forces of 3 N and 4 N act at right angles on a block of mass 5 kg.show that the resulting acceleration is 1 m/?

The flyer begins this move with their center of gravity 4 feet above the ground. One is thrown with an initial vertical velocity of 30 feet per second.

5. What’s really meant is that the forces are the same but going in different directions as a mirror image of one another. So when one force is going for example 2 newtons in a positive direction, the same amount is going in the opposite direction.

Friction is the force that opposes the force applied on an object, as well as the motion of the object. The two types of friction covered in this lab are kinetic and static, but there are other types as well. Static friction ƒs opposes motion so that things do not move in relation to each other. Kinetic friction ƒk is the friction when objects are already moving in relation to each other. Examples of static friction and kinetic friction are riding a bike and moving furniture across the floor, respectively. It is important to note that friction is not dependent on the size of the area of contact between two surfaces assuming uniform surfaces. It is known that as the block pushes on the table, the table pushes back. This force is known as the normal force (ƒN) which is the equal force perpendicular to the object. In this experiment, it is noted that the table and room are stationary objects, and thus have no acceleration on them. This means that when the block is also stationary, the net force on the block is zero.

3. What happens to the total force as the muscle length is increased from 50mm to 100 mm?

HYPOTHESIS: Without the effects of friction the momentum will be conserved in the isolated system. In all three experiments the momentum before the interaction will equal the momentum after the interaction.

Answer 1: Exerting a force does not imply that work is done. Work is calculated as Force x Distance. Work is said to be done on an object when the force on the object causes the object to move some distance. Ife the object does not move, no work is done immaterial of how much force is exerted. There are many situations when force is exerted but work is not done. For example, if you hold a piece of wood while helping in a project, effort is done to hold the wood in place, but since the force doesn’t cause the wood to move, work is not said to be done. The force has to be in the direction of motion to require work to be done.