2. The figures below show free body diagrams for 2 kg object. Determine the numerical values of the acceleration components ax and ay.

Activity 2.4. B. HOW MUCH DO I WEIGH? A. You stand on a bathroom scale that rests on the floor inside the elevator. Standing on the scale compresses the internal springs and activates a dial that indicates your weight in newtons. When the elevator is at rest, the scales reading is 550 N. The the elevator begins to move upward with a constant acceleration of 2.5m/s?. 4. Draw the free-body diagrams for this problem.

Pull the sledContext It's a wonderful winter's day, you bring your little cousin sledding! To get to the mountain, you have to pull your little cousin in the sled on the snowy sidewalk (a horizontal surface). It's still a good exercise for the arms, you wonder how much force you need to provide to pull the sled rope. Information You know your cousin's mass.You walk at a constant and known speed on the sidewalk.You know the static and kinetic coefficients of friction of the sled on the snow.You know the angle between the string you are pulling and the horizontal. Schematization Draw a diagram of the object that interests us. Draw your x and y axes. Draw and name each force experienced by the object that interests us. Modelization Created a model for the tension force modulus which will be used to pull the sled based on the available parameters that are relevant (they may not all be!). Then test your model with the following values: Mass of your cousin: 30kg Walking speed: 1.6m/s…

3. A block of mass m is placed in a straight, horizontal gutter that allows the block to move onlyalong the gutter. There is a coefficient of friction between the block and the gutter of μ . Youexert a constant force of F at an angle of θ above the horizontal and pull the block a distance of d. The block starts at rest and ends at some speed, vf. Derive an expression for vf, final speed ofthe block