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Question1
A 27 kg chair initially at rest on a horizontal floor requires a 377 N horizontal force to set it in motion. Once chair is in motion, a 351 N horizontal force keeps it moving at a constant velocity.
The acceleration of gravity is 9.81 m/s2.
What is coefficient of static friction between chair and floor?
Question2
A person driving her car at 51 km/h approaches an intersection just as traffic light turns yellow. She knows that a yellow light lasts only 2.0 s before turning to red, and she is 30 m away from the near side of the intersection. The intersection is 15 m wide. Her car's greatest deceleration is -6.6 m/s2, whereas it can accelerate from 51 km/h to 70 km/h in 5.7 s. Overlook lengths of her car and her reaction time.
Scientists are working on a new technique to kill cancer cells by zapping them with ultrahigh-energy (in the range of 1Ã-1012 Watts, What is the maximum value of the electric field in the pulse
Consider a solid sphere, mass = 4.0 kg, that is spinning with an angular velocity of 23 radians/second.The diameter of the sphere is 0.20 meters
question1a movable piston having a mass of 12 kg and a cross-sectional area of 7 cm2 traps 0.25 mol of an ideal gas in
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. What is the period of a satellite in a geosynchronous orbit
what was the initial speed given to the rock. A light plane is headed due south with the speed of 154 km/h relative to still air. After 1.06 hour, the pilot notices that they have covered only 127km and their direction is not south but southeast (4..
The steel I-beam in the drawing has a weight of 1.50 × 103 N and is being lifted at a constant velocity. What is the tension in each cable attached to its ends
What is the kinetic energy
The horse on a carousel is 3.7m from the central axis. How fast is a child on the horse going
A constant force is applied to an object, causing the object to accelerate at 6 m/s^2?, What will the acceleration be if the force is halved
If the plane does 2.00 x 105 J of work to tow the glider 155 m and the tension in the tow rope is 2460 N , what is the angle between the tow rope and the horizontal
An Escort and a Camaro traveling at right angles collide and stick together. The Escort has a mass of 1300 kg, What was the speed of the Camaro
A double-slit experiement has slit spacing 0.160 mm. What should be the slit distance L if the bright fringes are to be 4.70 mm apart when the slits are illuminated with 652 nm laser light
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