How far would a 4.0N force need to push a 2.0kg object to accelerate it from rest (0 m/s) to 10 m/s? A) 2.5 m B) 5.0 m C) 25 m D) 80 m
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- 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.) 0.43When starting a foot race a 72.6 kg sprinter exerts an average force of 584N backward in the ground for 0.793s. A) what is the final speed in m/s b) how far does he travel in MA car has a mass of 1100 kg. It accelerates continuously from rest and travels reaches a speed of 26 m/s in a time of 4 s. a) Find the force needed to accelerate this car in Newtons. b) Find the force needed accelerate this car in pounds.
- We start with some review problems A crate of mass 22.9 kg rests on a level surface, with a coefficient of kinetic friction 0.169. You push on the crate with an applied force of 235 N. What is the magnitude of the crates acceleration as it slides?A) 4.30 m/s^2B) 12.31 m/s^2C) 8.60 m/s^2D) 10.26 m/s^2mass. You place the mass on the ramp at an angle high enough that the mass starts sliding. You measure the time it takes to fall down a known distance, The time it takes to fall down the 45 degree ramp You have devised an experìment to measure the kinetic coefficient of friction between a ramp and a starting from a standstill is At = 0.55 sec, m-1 kg, and the distance it falls, Az, is 0.5 m. What is ? 7. Ax in At UgA boxer moves into the punch so as to decrease the duration of impact by half,by how much will the force of impact be increased? A. increased by 4 times B. increased by 2 times C. increased by 3 times D. increased by 2.5 times
- A) 10 kg m B) I kg.m C) 100 kg.m 9 and 10) 2-kg weight which is attached to a 1.5 m length string, is released from rest when it is at position A. Determine a) its specd and b) the tension in the cord when the bob passes through its lowest position, B. 9) Speed A) 1.25 m/s B) 2.28 m/s C) 3.98 m/s D) 4.56 m/s E) 5.42 m/s 1.5 m 10) Tension A) 51.96 N B) 58.90 N B C) 66.26 N D) 89.89 N E) 95.12 NWhat happens to the object when you apply a constant force on it in space? A. It will not move B. It will continuously move C. It will move faster D. None of the aboveA Roller Coaster train and its passengers have a combined mass of 1375 kg. The train comes over the top of the first hill on a roller coaster, 45 m above the ground with a velocity of 10.5 m/s. a) The train goes down the hill on to another hill 18 m above the ground. What is its velocity on top of the second hill. b) What will be its velocity when it reaches the ground level from the top of the second hill.