The acceleration of an object sliding along a frictionless ramp that is inclined at an angle 0 is a. g cose b. g sine c. g tane d. g е. zero
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- Thanks for the help!!The coefficient of friction between a race car's wheels and the track is 1.0. The car starts from rest and accelerates at a constant rate for 275 m. Find the maximum speed at the end of the race.a. 52 m/s b. 57 m/s c. 73 m/s d. 86 m/sThe weight of the rock is 76N. An upward force of 106N is exerted on the rock. What is the net force acting on the rock? A. 76 N downward B. 30 N upward C. 182 N downward D. 106 N upward
- An adventurous Bravestone must cross a river and starts running toward it. As he runs, he notices a rope hanging from a tree limb. He grabs the rope and swings. Which of the following statement is true as Bravestone reaches the lowest point of the swing? a. the tension in the rope is equal to his mass times his acceleration. b. the tension in the rope is greater than his weight. c. his acceleration is downward at . d. the tension in the rope is equal to his weight.A 4 kg object starts from rest from the top of an rough 30o incline and slides 3.0 m down the incline in 2.0 s. Find the coefficient of friction between the block and the incline. A.) 0.90 B.) 0.33 C.) 0.25 D.) 0.43A box is being pulled to the right over a rough surface. T> fk, so the box is speeding up. Suddenly the rope breaks. What happens? The box Select one: a. Slows steadily until it stops b. Continues with the speed it had when the rope broke С. Continues speeding up for a short while, then slows and stops. O d. Keeps its speed for a short while, then slows and stops. e. Stops immediately
- a. An object that is free-falling is acted upon by the force of gravity alone. b. A falling skydiver which has reached terminal velocity is considered to be in a state offree fall. c. A ball is thrown upwards and is rising towards its peak. As it rises upwards, it is NOT considered to be in a state offree fall d. An object in free fall experiences an acceleration which is independent of the mass of the object. e. A ball is thrown upwards, rises to its peak and eventually falls back to the original height. As the ball rises, its acceleration is upwards; as it falls, its acceleration is downwards. f. A ball is thrown upwards, rises to its peak and eventually falls back to the original height. The speed at which it is launched equals the speed at which it lands. (Assume negligible air resistance.) g. A very massive object will free fall at the same rate of acceleration as a less massive object.A 200 kg object stay in rest on a 60 degree slope, the normal force on the object is: a. 200 kg b. 1960 N c. 1697 N d. 490 N e. 980 NA cart of mass 0.85 kg is on a track, connected by a string over a pulley to a hanging mass of 0.1 kg. A friction pad is attached to the bottom of the cart, and you push the cart so that it first moves toward the sensor, then away from the motion sensor. The net acceleration of the cart does which of the following? a. always points away feom the motion sensor b. always points toward the motion sensor c. the direction of the net acceleration cannot be determined
- A 0.5 kg block is pushed up a ramp at a constant velocity between points A and B. The ramp is inclined at an angle of 18°. What is the net force on the block as it moves up the ramp? B A. 4.9 N B. 0.5 N C.ON D. cannot be determined from the information given E. none of the aboveAn automobile of mass 2 500 kg moving at 50.0 m/s is braked suddenly with a constant braking force of 8 500 N. How far does the car travel before stopping?a. 7.35 m b. 368 m c. 184 m d. 551 mA 100 kg crate is being pushed on a horizontal floor at constant velocity. Given that the coefficient of kinetic friction between crate and floor is uk = 0.2, what is the frictional force? F Select one: a. 196N O b. 250N O c. 500N d. 980N