SPH4U-Unit-2 Activity-4 Assignment -1 1. A shopper pushes a loaded grocery cart with a force of 12.6 N. The force makes an angle of 21.80 above the horizontal. Determine the work done on the cart by the shopper as he pushes the cart 14.2 m. 2. The horse in Figure 10 pulls a rider on a sleigh across a snowy horizontal field. The force of the rope is 22.8 N, and the horse does 9.53 x 102 J of work pulling the sleigh a distance of 52.6 m. Calculate the angle between the rope and the horizontal. 3. A car of mass 1.5 x 10 kg is initially travelling at a speed of 1 1 m/s. The driver then accelerates to a speed of 25 m/s over distance of 0.20 kmn. Calculate the work done on the car. 4. A truck of mass 9.1 x 10 kg is travelling along a level road at an initial speed of 98 km/h and then slows to a final speed of 27 km/h. Determine the total work done on the truck. 5. A 2.5 kg piece of wood falls onto a carpenter's table from a height of 2.0 m above the table. (a) Calculate the kinetic energy of the wood as it hits the table. (b) Calculate the speed of the wood as it hits the table. 6. Calculate the gravitational potential energy relative to the ground of a 5.0 kg Canada goose flying at a height of 553 m above the ground. 7-(a) A skier of mass 110 kg travels down a frictionless ski trail with a top elevation of 210 m. Calculate the work done on the skier by gravity as the skier travels from the top of the trail to the bottom. (b) Calculate the speed of the skier when he reaches the bottom of the ski trail. Assume he starts from rest. 8. Calculate the elastic potential energy stored in a spring with a spring constant of 5.5 X 10' N/m when it (a) stretches 2.0 cm (b) compresses 3.0 cm 9. A 5.2 kg mass hung from a spring vibrates with a period of 1.2 s. Calculate the spring constant. 10. A spring has a spring constant of 1.5 x 10 N/m. Determine the length that the spring should be stretched to store 80.0 J of energy