1.A 5000-kg truck traveling with a speed of 10 m/s skids to a stop. The truck experiences a 20000N force of friction. Determine the stopping distance of the truck

Forces: A 7.60×103 kg transport truck is approaching a 20.0° icy hill that has a bridge at the top that is out of service. The driver immediately slams on the brakes and begins to skid up the hill. The coefficient of kinetic friction between the tires and the hill is 0.350. If there is only 131 m from the bottom of the hill to the bridge what maximum speed can the truck initially be going and still avoid an accident?

please just say which option is right, no need for explain

3. A base year student with a mass of 85 kg slides on a surfboard down the stairs in NI:0E11 with a constant speed of 3.0 m/s. The stairs have an angle of 15.0 degrees to the ground. (a) Free the surfer (ie the surfer and the teacher as a unit). (b) Calculate the frictional force.

An object with a mass of 4kg lies on a rough plane inclined at 20 degrees to horizontal. A force of 35N is applied parallel and up the plane. The object accelerates at 2.5m/s^2. What is the Uk between the object and plane

Wing Loading of = 570 N/m² Co = 0.06 +0.0150₂² The glider was launched at 500 meters altitude. Calculate for mimimum rate of descent in meters per second. (Round off answer with two decimal places, No units, No commas) Answer given: 23554 Which is not true about the effect of altitude? A. Points with the same value of a therefore must have the same glide path angle. B. The drag polar changes with flight speed. C. The glide path angle is independent of altitude and depends solely on the angle of attack.

A 74507450‑kg car is travelling at 28.728.7 m/s when the driver decides to exit the freeway by going up a ramp. After coasting 404404 m along the exit ramp, the car's speed is 13.513.5 m/s, and it is ℎ=10.7h=10.7 m above the freeway. What is the magnitude of the average drag force ?dragFdrag exerted on the car?

A 10N force is applied (pushed down) at a 37 degrees angle onto a Box at rest. The Box then reaches a speed of 30 m/s in 15 seconds along a frictionless surface. What is the mass of the Box in kg?