Please do help me with this Physics subject. Show solutions clearly. I promise to give a perfect score as a feedback. Please do help me please. Thank you... WORK, ENERGY AND POWER is the topic.

1. A huge box having a mess of sea kg Is pulled down along a Motionless surface inclined at 41D" below the horizontal by a constant force of 121 N that is parallel to the lncllne. The baggage was initially at rest at the top of the ramp and is moving at 5.52 mils when it reaches the bottom of the ramp. The coefcient of kinetic friction between the box and the inclined surface is (1.39. [a] How much work is done on the box by all forces acting on it? {ti} How long is the inclined surface? 2. A 2.70 kg block starts from rest and slides a distance d down a frictionless 32.10 inclined surface (Figure 3.10). 2.70 kg While sliding, it comes into contact with an uncompressed spring of negligible mass and force constant of 760 N/m. If the height through which the block slides down the inclined d is 2.40 m, (a) find the maximum compression of the spring. 2. 40 m (b) What is the speed of the mass when it comes into contact with the spring? (c) What is the initial separation distance d between the mass and the spring?3. Two blocks of masses mA = 2.90 kg and mg = 6.30 kg are connected by a light string that passes over a frictionless pulley. The block mA resting on a frictionless horizontal tabletop is attached and forced against a horizontal spring of negligible mass with one end fastened on the wall (Figure 3.11) and with mg force constant of 370 N/m. When the spring is compressed to 15 cm, the system is suddenly released. Using the principle of energy conservation, (a) what is the speed of the block ma when the spring reaches equilibrium? (b) As block ma continues to descend, the spring is also stretched to the right by ma. What is the maximum distance the spring will be stretched?4. In a water slide whose total length is 5.5 m as shown in Figure 3.12, a 30 kg child slides from the top to the end of the slide and splashes into the water pool. The child encounters a constant friction between his body and slide of 45.0 N. (a) What is the speed of the child as he left the water slide? (b) 3.0 m TTI What is the speed of the child as it splashes on the pool? 50 cm5. An elevator car has a mass of 800 kg and is carrying passengers having a combined mass of 500 kg. As the elevator ascends, it encounters a constant frictional force of 3600 N. (a) What must be the minimum power delivered by the motor to lift the elevator car at a constant speed of 3.00 m/s? (b) What power must the motor deliver at the instant its speed is 3.00 m/s if it is designed to provide an upward acceleration of 1.00 m/s