8.Question 8You have shopping cart full of groceries and that cart is on a ramp. You are exerting an uphill force on the cart, so that the net force on the cart is zero. What energy transfer is occurring?1 pointIf the cart is moving, you are transferring energy to the cart.If the cart is moving uphill, you are transferring energy to the cart. If the cart is moving downhill, the cart is transferring energy to you.You are transferring energy to the cart, whether the cart is moving or motionless.No energy is being transferred between you and the cart.

A ball is projected vertically upwards. Which of the following best describes the energy transfer which occurs as it travels upwards?Energy from its thermal store is transferred to its gravitational potential storeEnergy from its gravitational potential store is transferred to its kinetic storeEnergy from its kinetic store is transferred to its gravitational potential storeEnergy from its elastic potential store is transferred to its gravitational potential store2A skateboarder initially has 5 kJ of kinetic energy. As she freewheels along a flat section of path, she does 400 J of work against friction and air resistance.  Calculate her final kinetic energy.405 J5200 J4.6 kJ395 J3Calculate the kinetic energy of a truck of mass 10,000 kg which is travelling at 20 m/s.2 MJ200,000 J100 kJ4,000,000 J4A 300 kg boulder is resting at the top of a 50 m-high hill. Calculate its gravitational potential energy.  Take g = 10 N/kg.15,000 J360 J150,000 J1,500 J5A tennis ball of mass 100 grams is dropped from a height of 2 metres.  Calculate its speed just before it hits the ground.  In answering this question, you may assume that all of the gravitational potential energy which is initially stored by the ball is transferred to its kinetic store as it falls through the air.  Take g = 10 N/kg.3.16 m/s2 m/s6.32 m/s20 m/s

Which of the following is an example of potential energy transformed into kinetic energy?lifting a book above your headSetting a mouse trapCompressing a spring A mouse tripping a mouse trapRiding a bike to the top of a hill

The diagram shows the potential energy and kinetic energy of a roller coaster cart at a point located at the top of a large hill. If the cart is initially stationary it will have zero kinetic energy. Based on the height of the first hill the cart has 520 kiloJoules of potential energy.The point marked X represents the bottom of the hill where the cart's potential energy is equal to 0 Joules, but the kinetic energy is 480 kiloJoules.Based on the Law of Conservation of Energy which explanation provides support for what MOST LIKELY occurred?A 60 kiloJoules of kinetic energy were gained due to gravitational acceleration.B 40 KiloJoules of heat energy were released to the surroundings due to friction.C 420 KiloJoules of potential energy were transferred to heat energy.D 40 KiloJoules of chemical energy from fuel were released as heat energy.

A frictionless cart with a mass of 3.60 kg is rolling across a horizontal surface. A force of 5.20 N [W] acts onthe cart over a displacement of 12.0m [W]. If the final speed of the cart is 7.50 m/s, what was its initialkinetic energy?a. 67.2J c. 77.6 Jb. 38.9J d. 10.1 J

5.Question 5You are using a string to lift a heavy picnic basket up to your treehouse. Alas, the string isn't strong enough for the job. The picnic basket becomes motionless, even though you are moving the portion of string you are holding upward, and the string breaks. Breaking the string required energy and that energy was provided by1 pointthe picnic basket.both you and the picnic basket.you.the string's elastic potential energy.