If a rbus starts out at a height of 2 m moving at a velocity of 8 m/s, assuming no friction, what maximum height can it achieve, in m, going uphill?
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If a rbus starts out at a height of 2 m moving at a velocity of 8 m/s, assuming no friction, what maximum height can it achieve, in m, going uphill?
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- MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER In a downhill ski race surprisingly little advantage is gained by getting a running start. This is because the initial kinetic energy is small compared with the gain in gravitational potential energy even on small hills. To demonstrate this, find the final speed and the time taken for a skier who skies 65.0 m along a 25° slope neglecting friction for the following two cases. (Note that this time difference can be very significant in competitive events so it is still worthwhile to get a running start.) (a) starting from rest final speed m/s time taken (b) starting with an initial speed of 2.00 m/s final speed m/s time taken Additional Materials O ReadingAir bags are used in cars to decelerate the occupants slowly when a car is suddenly decelerated in a crash. (a) Compute the work done by the decelerating force acting on a 55.0 kg driver if the car is brought to rest from an initial speed of 20.0 m/s. (b) Find the minimum thickness of the air bag if the average decelerating force is not to exceed 8900 N (2000 lb), and the center of the car moves forward 0.800 m during impactDraw a diagram of a 50 kg box sliding down a 6 meter high plane angled 30o to the horizontal. If the coefficient of friction force between the box and the plane is 0.4, what is the speed of the box at the end of the plane?
- How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and its initial speed is 110 kmhkmh?10. Ā = -2â + -3ŷ and B = -4â + -4ŷ. Calculate R = Ã+B. Calculate 0, the direction of R. Recall that 0 is defined as the angle with respect to the +x-axis. A. 49.4° B. 130.6° C. 229.4° D. 310.6°A 82 kg wooden box slides down a 10 m high wooden ramp which makes an angle of 40̊ with the horizontal. Calculate (a) the change in gravitational potential energy. (b) If the non-conservative work lost because of friction is 20% of box weight, find the final velocity of the box when it reaches the bottom of the ramp.
- A sled is initially given a shove up a frictionless 26.0 incline. It reaches a maximum vertical height 1.50 m higher than where it started at the bottom. a) What was its initial speed?Disregarding friction, a roller coaster with a vertical drop of 46 m will achieve a speed of about 30 m/s. If the height of the drop is doubled, how much the speed is going to be?A skier starts at the top of a frictionless slope and pushes off with a speed of 3.0 m/s. The elevation of the slope is 40 m. She skis down the slope to a valley with elevation 0.0 m and then glides to the peak of an adjacent slope that is at an elevation of 25 m. Calculate her speed at the second peak
- A skier starts from rest and moves down on each of the inclines shown. In which case will the skier have the lowest speed at the bottom of the incline (A) if there is negligible friction and (B) if there is significant friction.A 600-kg roller coaster car starts at a height of 35.0 m. Assuming negligible energy losses to friction and air resistance, determine the PE, KE, and speed of the car at the carious locations (Start, A, B, C, D, E, and F) along the track. Round your answers to the nearest whole number.Consider a 0.5 kg mass at the top of a 1.5 m high (vertical) incline. if it is allowed to slide down with negligible friction, what will be its speed (in m/s) at the bottom?