A 1.50 kg block slides on a rough horizontal surface. The block hits a spring with a speed of 2.50 m/s and compresses it a distance of 11.0 cm before coming to rest. Part A If the coefficient of kinetic friction between the block and the surface is 0.510, what is the force constant of the spring? k= 195| ΑΣΦ 3 Submit Provide Feedback Request Answer ? N/m Next >

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X Incorrect The 14.9-in.spring is compressed to a 7.6-in. length, where it is released from rest and accelerates the sliding block A. The acceleration has an initial value of 440 ft/sec² and then decreases linearly with the x-movement of the block, reaching zero when the spring regains its original 14.9-in. length. Calculate the time t for the block to go (a) 3.65 in. and (b) 7.3 in. -7.6 14.9 Answers: To go 3.65 in., t= i To go 7.3 in., t= 0.017 0.012 sec sec

A 79.2-kg climber is scaling the vertical wall of a mountain. His safety rope is made of a material that, when stretched, behaves like a spring with a spring constant of 1.30 x 103 N/m. He accidentally slips and falls freely for 0.570 m before the rope runs out of slack. How much is the rope stretched when it breaks his fall and momentarily brings him to rest? Number i Units

Part A Find the coefficient of kinetic friction between a 3.75-kg block and the horizontal surface on which it rests if an 84.0-N/m spring must be stretched by 6.40 cm to pull it with constant speed. Assume that the spring pulls in the horizontal direction. Ην ΑΣφ Submit Request Answer

A 10 kg runaway grocery cart runs into a spring with spring constant 240 N/m and compresses it by 62 cm. Part A What was the speed of the cart just before it hit the spring? Express your answer with the appropriate units. V = ☐ μA Value Submit Request Answer Units ?

QUESTION 9 A 10-kg block is attached to one end of a horizontal spring on a level, frictionless surface. The other end of the spring is attached to a vertical support. The spring obeys Hooke's law and has a spring constant of k = 160 N/m. A physics student pulls the block outward so that the spring stretches by 40 cm. The student releases the block at time t = 0.00 s. Which of the following equations properly gives the position as a function of time? a. x(t) = (- 1.6 m/s)sin(4.0t) b. x(t) = (- 6.4 m/s2)cos(4.0t) C. x(t) = (10 m)cos(4.0t) d. x(t) = (0.40 m)cos(4.0t) e. x(t) = (4.0 m)cos(0.40t)