Problem 4: You have been hired to design a family-friendly see-saw. Your design will feature a uniform board (mass M= 7 kg, length L = 3.1 m) that can be moved so that the pivot is a distance d from the center of the board. This will allow riders to achieve static equilibrium even if they are of different mass, as most people are. You have decided that each rider will be positioned so that his/her center of mass will be a distance xoffset = 16 cm from the end of the board when seated as shown. You have selected a child of mass mj = 29 kg (shown on the right), and an adult of mass m2 = 61 kg (shown on the left) to test out your prototype. Xffset Xoffset Part (a) Determine the distance d in meters. Numeric : A numeric value is expected and not an expression. d = Part (b) Determine the magnitude of the force exerted on the pivot point by the see-saw while in use in newtons. Numeric : A numeric value is expected and not an expression. FN =

QQ2) Find the correct value of this question.

Plz use g = 9.8 m/s2 to find if needed

A 19 kg block rests on a 26 degree inclined frictionless surface and is attached by a light string to a 31 kg hanging mass where the string passes over a massless frictionless pulley. If g = 9.8    m/s2, what is the tension in the connecting string? ROUND TO 3 DECIMAL PLACES

Q18 only

SA3. A block is given an initial velocity of 5.00 m/s up a frictionless 20.0° incline. How far up the incline does the block slide before coming to rest? SA4. A man is pulling a crate along a concrete floor. This time, let's be specific. The crate has a mass of 100 kg and the man pulls with a force of 1 250 N. The coefficient of friction between the crate and the floor is 0.2. What is the acceleration of the crate? SA5. A horizontal force of 80 N is used to pull a 20 N wooden box moving toward the right along a horizontal, wood surface as shown. Calculate the magnitude of the frictional force acting on the box. Determine the magnitude of the force acting on the box. Determine the mass of the box. Calculate the magnitude of the acceleration of the box.

Dave with a mass of 60 kg goes tubing down a 20 m long hill that has an angle off the horizon of 25º. (Gravity applies) a. He gets a push from the bottom of the hill, so his initial velocity is 2 m/s. How far up the hill will he go before stopping? (there’s no friction) b. He goes back down the hill and then his friend Jill tries to pull him on the tube across a small patch of grass (μk=0.30). If she is pulling parallel to the ground at constant 5 m/s for 5 sec how much power does she expend? c. After climbing back uphill, Dave decided to roll down the hill instead. If he were to be a long cylinder with a radius of 0.1 m, what is his moment of inertia? d. After rolling without slipping down the hill, what is Dave’s final velocity at the bottom of the hill? What is his angular velocity at the bottom of the hill? Dave with a mass of 60 kg goes tubing down a 20 m long hill that has an angle off the horizon of 25º. (Gravity applies)   He gets a push from the bottom of the hill, so his…