Search & Filtering
Just as her parachute opens, a 60-kg parachutist is falling at a speed of 50.0 m/s. After 0.80 seconds has passed, the chute is fully open and her speed has dropped to 12.0 m/s. Find the average retarding force exerted upon the chutist during this time if the deceleration is uniform.
A 2.5 kg object is whirled in a vertical circle whose radius is 0.89 m. If the time of one revolution is 0.94 s, the magnitude of the tension in the string (assuming uniform speed) when it is at the bottom is ___x102N. (Give your answer with 2 sig digs, and do not include units)
A student is rotating a bucket of water in a vertical circle with a radius of 0.85m. In order for water to not spill out at the top of the swing, the bucket requires a minimum speed of ___m/s. (Give your answer with the correct number of significant digits and do no include units)
What are the horizontal range and maximum height of a bullet fired with a speed of 20 m/s at 30° above the horizontal?
A block of mass 500 g presses a spring with distance X, as shown in figure. The spring is negligible mass and has spring constant 4500 mN/m. When it is released, the block travels along a frictionless horizontal surface to point A, the bottom of frictionless circular track of radius R = 2 m and continue to move up the track. The block’s speed at point A is 12 m/s. What is X? and What is minimum X to complete the circular motion?
7, Earth has an orbital period of 365 days and its mean distance from the Su planet Pluto's mean distance from the Sun is 5.896x109 km. Using Kepler's the orbital period in Earth days.
8. The planet Venus orbits the Sun with a mean orbital radius of 1.076x101
is 1.99x1030 kg. Using Newton's version of Kepler's third law, calculate the orbital period of Venus.
A 0.2kg is drag 0.5m upward with a uniform velocity along a plane inclined 30° with the horizontal by a force parallel to the incline. The coefficient of kinetic friction between the object and the plane is 0.25. How much work is done by the applied force? Show complete solution.
Suppose that a force F=250 N applied at 20° below the horizontal is just enough to start the motion of the 55 kg crate in Sample Problems 3.5 item 3. Find the (a) normal force and (b) coefficient of static friction. please explain it by step-by-step with explanation THANK YOUUU
There are two cans of food are sitting on a kitchen counter. The same pressure is exerted on the table by each of the weights of the cans; however the cans are not identical and the densities of the contents are not identical. The radius of can 1 is r1 = 0.045 m and the radius of can 2 is r2 = 0.025 m. The density of can 1 is ρ1 = 810 kg/m3, the density of can 2 is ρ2 = 980 kg/m3, and the height of can 1 is h1 = 0.18 m.
What is the acceleration of a 45kg block at rest pushed by a 280N horizontal force up to 30degree inclined planw with a roughness coefficient of 0.15
