5. This time, the pendulum is 1.55 m long and has a mass of 3.07 kg. You give it a push away from vertical so that it starts swinging with a speed of 2.65 m/s. Due to friction at the pivot point, 1.00 Joule of the pendulum s initial kinetic energy is lost as heat during the upward swing. What maximum angle will it reach, with respect to the vertical, before falling back down? 44.4 degrees 37.8 degrees 39.7 degrees 49.1 degrees
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5. This time, the pendulum is 1.55 m long and has a mass of 3.07 kg. You give it a push away from vertical so that it starts swinging with a speed of 2.65 m/s. Due to friction at the pivot point, 1.00 Joule of the pendulum s initial kinetic energy is lost as heat during the upward swing. What maximum angle will it reach, with respect to the vertical, before falling back down?
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44.4 degrees |
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37.8 degrees |
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39.7 degrees |
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49.1 degrees |
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- I need help with finding the last part. A moving 1.70 kg block collides with a horizontal spring whose spring constant is 303 N/m. The block compresses the spring a maximum distance of 14.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.120. What is the work done by the spring in bringing the block to rest? How much mechanical energy is being dissipated by the force of friction while the block is being brought to rest by the spring? What is the speed of the block when it hits the spring?Please answer in 15 mins.A crane lifts a 268 kg crate a height of 12.4 m in a time of 80.0 s at a constant speed. What is the crane's power? Select one: 41.5 W Ob. 4.08 x 102 W O c. 3.32 x 10³ W O d. 3.26 x 104 W a. The time required for one complete oscillation of a vibrating object is called
- A 72kg boy is surfing and catches a wave that gives him an initial speed of 1.60m/s. He then drops through a height of 1.52m, and ends with a speed of 8.50m/s. How much nonconservative work(in kj) was done on the boy?4. Suppose you fire a mass m straight vertically upwards from a spring that is known to have been compressed a distance x from its equilibrium position, and the mass reaches a maximum height of h above its launch point. Using the conservation of energy, derive an expression for the spring constant k of the spring.This time, the pendulum is 1.07 m long and has a mass of 3.19 kg. You give it a push away from vertical so that it starts swinging with a speed of 1.02 m/s. Due to friction at the pivot point, 1.00 Joule of the pendulum s initial kinetic energy is lost as heat during the upward swing. What maximum angle will it reach, with respect to the vertical, before falling back down? 18.1 degrees 20.5 degrees 19.3 degrees 11.4 degrees
- 7. A block of mass m slides with constant velocity v down a plane inclined at 0 with the horizontal. During the time interval At, what is the magnitude of the energy dissipated by friction? (a) mgv At tan 0 (b) mgv At sin 0 (c) 1/2 mv3 At (d) The answer cannot be determined without knowing the coefficient of kinetic friction.A block of mass m=1.2 kg is attached to a horizontal spring of force constant k=75 N/m. The block is pushed, and spring is compressed, to the position 10.0 cm to the left of the equilibrium position; then, block is released. A. Neglect friction. Find the speed of the block as it passes through the equilibrium position. B. If the friction is significant and µ = 0.22, what is the speed of the block as it passes through the equilibrium position? Please show the detailed solution, Thank you33. The spring constant of the spring below is 600 N/m. An object attached to it has a mass of 2.0 kg and is pulled 0.80 m to the right and released at time t=0. What is the first time (in milli-seconds) at which the kinetic energy is one-fourth the spring's potential energy? AGRO 2.0 kg x=0 600 N/m wwwwwwwwwwwwwwww *** 0 (a) 47.5 (b) 59.7 (c) 26.8 (d) 22.4 (e) none of these my 0.80 m 19.1
- A cart of mass 0.72 kg is attached to one end of of a spring and placed on a low-friction track, inclined at an angle of 56.0 degrees with respect to the horizontal. The cart is found to be in equilibrium when the spring is stretched to a total length of 44.8 cm. Given that the rest length for the spring is 12.8 cm, what is the spring constant for the spring?5. A cart with m= 3.40kg rides on the track shown. The track is frictionless except for a level section 0.40m long where μk = 0.54. The cart is initially at rest against spring 1 (k₁ = 1400N/m) which is compressed by 8.00cm. When released it travels along the track until it reaches spring 2 (k2= 800N/m) which it compresses until the cart stops. If h₁ = 0.38m and h₂ = 0.14m, determine the speed of the cart at points A, B, C and D. Also how much will spring 2 be compressed at the end. framm] =3.40kg kží = 800 N/m Remb A k₁=1 2₁-1400/m h₁-0,38 D B d=0.40m = 0,54 мк of ....... oservation Im h₂= = 0,14This time, the pendulum is 1.93 m long and has a mass of 3.17 kg. You give it a push away from vertical so that it starts swinging with a speed of 1.62 m/s. Due to friction at the pivot point, 1.00 Joule of the pendulum s initial kinetic energy is lost as heat during the upward swing. What maximum angle will it reach, with respect to the vertical, before falling back down? 18.7 degrees 21.5 degrees 31.8 degrees 26.7 degrees