The force of air drag experienced by a falling objects depends on two things. First the speed of the falling objects. What is the second thing?
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The force of air drag experienced by a falling objects depends on two things. First the speed of the falling objects. What is the second thing?
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- A hockey puck sits at rest on a frictionless surface. The puck is pushed with a particular constant force for 3 seconds and achieves a speed of 5 m/s. In order to achieve a the same speed with a force half as strong as the original one the hockey puck needs to be pushed for O 3 seconds 6 seconds 9 secondsA commercial airplane is coming in for a landing. Just before it hits the runway it is moving at 76 m/s. The plane has a mass of 20,000 kg. The runway is 1.6km long and, obviously, the airplane needs to be stopped before it reaches the end of the runway. How large is the braking force the airplane needs to stop safely before the end of the runway?A crate with mass m = 20 kg is being pushed to the right by a force of magnitude F = 80 N The crate is placed on a rough horizontal coefficient of kinetic friction surface with a HK= 0.2 Take g = 10 m/s² The acceleration of the crate is: 3.8 m/s^2 O 2 m/s^2 O 6 m/s^2 4 m/s^2
- Two go-karts are pushed from the same starting point with the same constant force. They are each pushed a distance of 5 meters. One go-kart is two times as heavy as the lighter one. Which go-kart is moving faster when it reaches the 5 meter mark?A student wants to angle a ramp such that if she releases a 2.8kg cart at the top of a ramp, the cart will travel 210cm and hit the end of the ramp in 1.6s. Neglect backwards friction and drag. What does the magnitude of the net force on the cart need to be? What does the magnitude of the cart's acceleration need to be? At what incline angle (0) does the ramp need to be slanted? m/s2 What will be the maximum speed of the cart? m/s cannot be detem check answersA horizontal force of 5.0 N pushes a 0.50-kg block against a vertical wall. The block is initially at rest. If µ. – 0.60 and 0.50, the acceleration of the block is: Ⓒ4.8 m/s² Ⓒ3.8 m/s² Ⓒ 9.8 m/s² 0.0 m/s² 08.0 m/s2
- A magician pulls a tablecloth from under a 200 g mug located 15.0 cm from the edge of the cloth. The cloth exerts a friction force of 0.100 N on the mug and is pulled with a constant acceleration of 3.00 m/s2. How far does the mug move relative to the horizontal tabletop before the cloth is completely out from under it? Note that the cloth must move more than 15 cm relative to the tabletop during the process.A person stands on a scale inside an elevator at rest (see the figure below). The scale reads W = 625 N. a W (a) What is the person's mass? kg (b) The elevator accelerates upward momentarily at the rate of a = 4 m/s?. What does the scale read then? N (c) The elevator then moves with a steady speed of 6 m/s. What does the scale read now?A car is traveling at 15 m/s on a horizontal road. The brakes are applied and the car skids to a stop in 4.0 s. The coefficient of kinetic friction between the tires and road is: Friction Road Direction of travel