An automobile increases its speed uniformly from 22 km/h to 71 km/h in 0.44 min. A...
1)An automobile driver increases the velocity at a constant rate from 25 km/h to 55 km/h in 0.50 min. A bicycle rider speeds up at a constant rate from rest to 30 km/h in 0.50 min. Calculate (a) the driver’s acceleration and (b) the rider’s acceleration.
The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and runs 46 m in a straight line, reaching a final speed of 95 km/h. (a) Determine the cheetah's average acceleration during the short sprint. m/s2 (b) Find its displacement at t = 3.2 s. (Assume the cheetah maintains a constant acceleration throughout the sprint.) m
A person takes a trip, driving with a constant speed of 97.5 km/h, except for a 22.0-min rest stop. If the person's average speed is 72.6 km/h, find the following. (a) How much time is spent on the trip? (b) How far does the person travel? A truck covers 40.0 m in 8.65 s while uniformly slowing down to a final velocity of 3.40 m/s. (a) Find the truck's original speed. (b) Find its acceleration.
A large rotating cylinder uniformly increases in angular speed from rest to 0.220 rev/s in 31.0 s. What is its angular acceleration in radians per second per second? (a) A large rotating cylinder uniformly increases in angular speed from rest to 0.220 rev/s in 31.0 s. What is its angular acceleration in radians per second per second? rad/s2 (b) The same cylinder again starts from rest and accelerates uniformly in the same time interval, but now the angular acceleration is...
A train accelerates from 10 km/h to 110. km/h in 2 min 15 s. Find its acceleration (in M/s2).
An automobile of mass m=1600kg travels at a speed of of 35 km/h. when the driver jams on the brakes, causing all four wheels to lock, the automobile skids to rest in 7m. determine the magnitude of the normal reactions and of the friction force at each wheel as the automobile skidded to rest. CG is 400mm from surface and 1200mm away from both wheels a and b.
A speedboat increases its speed uniformly from 30 m/s to 40 m/s in a distance of 300 m. Find a. the magnitude of its acceleration and b. the time it takes the boat to travel the 300 m distance.
A curve of radius 71 m is banked for a design speed of 95 km/h . If the coefficient of static friction is 0.40 (wet pavement), at what range of speeds can a car safely handle the curve? Express your answers using two significant figures. Enter your answers numerically separated by a comma.
A car has a top speed of 71 m/s (about 159 mi/h) and has wheels of radius 35 cm. If the car starts from rest and reaches its operating speed after 7.1 s, what is the angular acceleration of the wheels? Assume the car accelerates uniformly. rad/s2 explain please
Determine the stopping distances for an automobile with an initial speed of 95 km/h and human reaction time of 1.0 s : (a) for an acceleration a = -5.2 m/s2 , (b) for a = -6.6 m/s2 .