An applied force of 6 Newtons acts in the direction of motion of a block of mass 9 Kg, with the mass being pulled across the floor against a frictional force of .6 Newtons. Assume that the block moved the distance 'y' in this process.
* What is the net force on the object?
* How much work does the net force do on the object

Please help to explain the following graphs & questions in attachment.
An object of mass is attached to a vertically oriented spring. The object is pulled a short distance below its equilibrium position and released from rest. Set the origin of the coordinate system at the equilibrium position of the object and choose upward

A passenger is pulling on the strap of a 17.8 kg suitcase with a force of 68.9 N. The strap makes an angle of 35.7 degrees above the horizontal. A 38.6 N friction force opposes the motion of the suitcase. Calculate the acceleration of the suitcase.

Find the deterministic solution for defining the position of a reflective object where the direct path and reflective path are known and the angle between the object and the receiver are also known.
Please see the attached file for the diagram.

An object is close to a light source - say at a distance of x meters. Another object B is at a distance of 2.3 times x meters from the same light source or in equation from distance to B from the light source = 2.3 (x meters). Question is how many times closer to the light source is object A compared to object B?
Now, I know

1. A horizontal force of 7.2 N acting on a 1.0 kg object initially at rest moves it through a parallel distance of 2.5 m. How much work is done on the object?
2. A student with a mass of 71 kg climbs a flight of stairs 5.0 m high in 10s. Calculate the power expended by the student.
3. A box of mass 5.0 kg is pulled vertica

A 50-kg sled is pulled 20 meters over ice at a constant speed. The coefficient of friction between the sled and the ice is 0.13.
A) What is the frictional force?
B) How much work is done in pulling the sled 20 meters?

Hi. Can someone please show me how to do the following problem:
"An 11.2 g object moving to the right at 21.3 cm/s makes an elastic head-on collision with a 17.3 g object moving in the opposite direction at 31.5 cm/s. What is the velocity of the 11.2 g object after the collision? (positive is to the right)"
Thank you!