A stuntman drives a car with a mass of 1600 kg on a drawbridge. The car accelerates with a constant force of 8000 N. While he is driving, the drawbridge is raised to an incline of 30°. What is the car's new acceleration on this incline, ignoring the force due to air resistance? (Recall that g = 9.8 m/s2
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- A 12 kg block hanging on a string is pulled upward by the string with an upward acceleration of 6.2 m/s2. What is the tension in the string?While pushing your 55.0 kg lawnmower across the lawn (μ = 0.100) you notice that the handle makes an angle that is 55.0° below the horizontal. What force must you push the lawnmower with in order to have it accelerate at 2.0 m/s²?You place a crate of mass 35.1 kg on a frictionless 4.90-meter-long incline. You release the crate from rest, and it begins to slide down, eventually reaching the bottom 1.37 s after you released it. What is the angle of the incline? 41.9 degrees 62.9 degrees 37.1 degrees 32.2 degrees
- A 71.2 kg high jumper leaves the ground with a vertical velocity of 5.9 m/s. How high can he jump? The acceleration of gravity is 9.8 m/s^2 answer in units of mA person of weighing 0.83 kN rides in an elevator that has an upward acceleration of 0.8 m/s2. What is the magnitude of the force of the elevator floor on the person, in newtons?A person pushes a 0.20 kg lunch tray across a table, and it slows down as it slides because of friction. The coefficients of friction between the tray and the table are µs = 0.15 and µk = 0.11. What would the acceleration of the tray be?
- Consider a person standing on a scale in an elevator. If the elevator accelerates upwards with an acceleration of 1.47 m/s2 and the person has a mass of 98.1 kg, what would the scale read? HINT: you need to take into account the acceleration due to gravity, as well as that of the elevator.A 100-kg man stands in an elevator that starts to move from the fifth floor towards the first floor. In the initial portion of the trip, the elevator has an acceleration of 1.5 m/s2 . What is the force exerted by the floor on the man?A 34.8 kg child is sitting at the top of a slide, which is inclined at an angle of 55 degrees with respect to the horizontal. Someone gives the child a quick push to get them moving, after which they slide down the incline without any further assistance. The coefficient of kinetic friction between the child and the slide is μ s = 0.44. What is the magnitude of the acceleration (in m/s2) of the child?
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