Calculate the amount of work done on the system from 0–2 (Wo2) and then for the entire curve from 0–5 (Wos). Wo2 J Wos = J
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- ▾ Part A A system of two objects has AKtot 7 J and AUnt=-3 J. = Vocals Search B N How much work is done by interaction forces? Express your answer in joules. Wint ΜΕ ΑΣΦ Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Part B How much work is done by external forces? Express your answer in joules. Wat ΜΕ ΑΣΦ Submit Request Answer Provide Feedback msi ENTER SHIFT ? J J NO.A 1250 kg sports car accelerates from zero to 30 m/s in 25 s. What is the average power delivered by the car engine? Select one: a. 25.5 kW b. 22.5 kW с. 12.5 kW Previc ormula Sheet, CA-2, T-3, AY Jump to... 20-21 Activ LENGO toA 10.0-kg bob is attached to a rod whose length is 10.0 m. The right end of the rod is fixed, and the bob is released from rest. a) Determine the speed of the bob when it is below the pivot point (vertical angle is zero). b) Determine the tension in the rod when the bob is below the pivot point. hint: to determine the speed of the bob when it is below the pivot point, you will need to use Calculus.
- Is it experimentally possible that the energy absorbed by the cylinder due to friction could be greater than the work performed on it? Explain.1 Name: I I. A person's heart and head are 1.3 m and 1.8 m above the feet, repectively. Determine the potential energy of 0.5 kg of blood in the heart relative to (a) the feet, (b) the head. 1 I I I I I | I I I I I I1. A 23.0 kg child is playing on a swing with a length of 2.5 m. If the swing starts from rest and makes an angle of 40.0◦ with the vertical at the top of the swing, a) determine the child’s speed at the bottom of the swing neglecting friction. b) If the swing has a speed of 2.8 m/s at the bottom, determine the work done by friction during the downswing and, bonus) assuming the force of friction is constant, determine the maximum angle the swing attains on the upswing after passing through the bottom. Hint: Use the approximation that cos θ ≈ 1 − 1 2 θ 2 for angles given in radians.