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- A car moves at speed v across a bridge made in the shape of a circular arc of radius r. (a) Find an expression for the normal force acting on the car when it is at the top of the arc. (b) At what minimum speed will the normal force become zero (causing the occupants of the car to seem weightless) if r = 30.0 m?. The Kingda Ka roller coaster in New Jersey is the world’s tallest ride of its kind. As the passenger cars are launched from rest at the start, they are accelerated uniformly to a speed of 57 m/s (128 mph) in just 3.5 s. (a) What is the acceleration experienced by passengers on this ride in m/s2? In g’s? (b) If a certain passenger has a mass of 65 kg, what is the force in newtons that acts on him during the launch phase of this ride? What is the force in pounds?A 1100 kg car traveling at 27 m/s starts to decelerate and comes to a complete stop in 578.0 m. What is the average braking force acting on the car? v^2 - u^2 = 2as I know that what v^2 --velocity Can you break down the other components, such as the u, and as
- 2. The baggage truck A shown in the photo has a weight of 560kg and tows a 400kg cart B and a 295kg cart C. For a short time, the driving frictional force developed at the wheels of the truck is FA= (40z-) Newtons, wheret is in seconds. If the truck starts with a velocity of 1.50m/seconds, determine its speed (m/s) in 5.50 seconds. Also, what is the horizontal force (in Newtons) acting on the coupling between the truck and cart B at this instant? (1. A car goes down a frictionless 100incline for 1 m. What is it’s final velocity?2. A car goes down a 100incline with a coefficient of friction of 0.3 for 1 m. What is it’sfinal velocity?3. A car goes down a 100incline with a coefficient of friction of 0.3 for 2m. What is it’sfinal velocity?4. It takes 3 s for 25 g car to go down a 100incline for 1 m. ? How much work was doneby friction? What was the coefficient of friction?arked out of 00 In the figure shown, two masses being pulled by a force F = 15 N on a horizontal smooth surface. If Flag question the tension in the string connecting the two masses T = 5.0N and m2 = 2 kg. Find the mass m in (kg) a. b. 4 m, c. 1 d. O 1. b O 2.c O 3. d
- 1)A shingle slides down a roof having a 30 angle and falls off with a speed of 2.0 m/s.a. How long will it take to hit the ground?b. Calculate the highest point reached by it. 2)A 20.0 kg trunk is pushed across the floor of a moving van by a horizontal force. If thecoefficient of kinetic friction between the trunk and the floor is 0.255, what is the magnitudeof the frictional force opposing the applied force?13. Camping equipment weighing 6000 N is palled teo en lako he means of a horizontal 2ope The coefficiont of kinetie frietion is 006 How ich work in done by the campera in pulling the equipnent 1000m if it speedis inereing at the constint rate of 0.20m/s? A. HL2x10 B 18 103 C 30x10 J D 4.2 x 10 E 12 10J ane D14. What will the spring scale read for a 55kg student in an elevator that moves upward with a constant speed of 6m/s? A. 520N B. 530N C. 540N D. 550N
- 5. A 16,000 lb airplane starts from rest and has a uniform acceleration of 4 ft/s*. If it requires a speed of 90 ft/s to take off, find: a. the minimum run for the take-off. b. the minimum time from rest to take-off. c. the net engine thrust available for the said acceleration.1. A crate with a mass 32.5kg initially at rest on a warehouse floor is acted on by a net horizontal force of 140N. a. What acceleration is produced? b. How far does the crate travel in 10.0s? c. What is its speed at the end of 10.0s?You have a coin and you put it 20.0 cm from the middle of a spinning, horizontal turntable slips when its speed anmadı is 20.0 cm/s. What's the statio friction coefficient between the coin and the turntable? a. 0,01 eretle Ob002 Uyg C. 0.085 Kala Od. 0.1 O e. 2