Part A A spring of force constant 240.0 N/m and unstretched length 0.220 m is stretched by two forces, pulling in opposite directions at opposite ends of the spring, that increase to 15.0 N. How long will the spring now be? Express your answer in meters. Πν ΑΣφ m Submit Request Answer Part B How much work was required to stretch it that distance?

Part A A block with mass 0.50 kg is forced against a horizontal spring of negligible mass, compressing the spring a distance of 0.20 m (Figure 1). When released, the block moves on a horizontal tabletop for 1.00 m before coming to rest. The spring constant k is 100 N/m. What is the coefficient of kinetic friction uy between the block and the tabletop? ΑΣφ Hk = Submit Request Answer Provide Feedback Figure < 1 of 1 k - 100 N/m m = 0.50 kg H0.20 m 1.00 m

A C A student builds a roller coaster as shown. The heights of the points are A= 3.2 m B= 1 m C= 0 m. The mass of the marble is 4 g. Assume the ball is released at point A on the track and there is no friction. How much energy does the marble start with? units How much gravitational potential energy does the marble have at point A? units What is the velocity at point A? units

a.) Evaluate the dot product of the pair of vectors in (Figure 1). A⋅B= b.) Evaluate the dot product of the pair of vectors in (Figure 2). C⋅D= c.) Evaluate the dot product of the pair of vectors in (Figure 3). E⋅F=

A 700 kgkg elevator accelerates upward at 1.4 m/s2m/s2 for 14 mm, starting from rest. A. How much work does gravity do on the elevator? Express your answer with the appropriate units. B. How much work does the tension in the elevator cable do on the elevator? Express your answer with the appropriate units. C.What is the elevator's kinetic energy after traveling 14 mm? Express your answer with the appropriate units.

Using a cable with a tension of 1270 N, a tow truck pulls a car 5.00 km along a horizontal roadway.  You do not have to show your work.    Part A How much work does the cable do on the car if it pulls horizontally? Part B How much work does the cable do on the car if it pulls at 35.0∘ above the horizontal?   Part C How much work does the cable do on the tow truck if it pulls horizontally?   Part D How much work does the cable do on the tow truck if it pulls at 35.0∘ above the horizontal?     Part E How much work does gravity do on the car in part A?

A 15 kg crate has potential energy of 225j. How high is the crate lifted? Use g= 9.8m/s^2. DONT round your answer and choose one correct answer with the correct unit of measure. a. 22.9591 m b. 0.6533 m c. 1.53061 m d. 15.3061 m