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What is the acceleration of a car that from rest in 2minutes acquires a velocity of 99miles/hr? Give the answer in miles/sec
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- Sleds propelled by rockets are used to study how humans react to sudden acceleration. If a rocket-powered sled accelerates to a speed of 442.82 m/s in 1.71 seconds, what is the sled's acceleration (measured in meters per second squared)? Only the final answer, stated to three decimal places, should be rounded off.Tectonic plates are large segments of the earth's crust that move slowly. Suppose one such plate has an average speed of 3.0 cm per year.(a) What distance does it move in 97 seconds at this speed?m(b) What is its speed in miles per million years?mi/MyA car has acceleration of 4 m/s2 and starts from 1.8 m/s. What is its speed after 7.4 seconds, in m/s? Represent your answer with 3 significant figures. (Your answer should NOT have any sign nor unit, the SI unit is already given in the problem statement.)
- Light travels at a speed of about 3 x 108 m/s. (a) How manymiles does a pulse of light travel in a time interval of 0.1 s,which is about the blink of an eye? (b) Compare this distanceto the diameter of Earth.The acceleration of an object (in m/s2) is given by the function a(t)=8sin(t)a(t)=8sin(t). The initial velocity of the object is v(0)=−10v(0)=-10 m/s. Round your answers to four decimal places.a) Find an equation v(t) for the object velocity.v(t)v(t) = −8cos(t)−2Correct b) Find the object's displacement (in meters) from time 0 to time 3.3.4187Incorrect metersc) Find the total distance traveled by the object from time 0 to time 3. metersThe speed of a car as measured by a speedometer is 85 kilometers per hour (km/h). Convert this unit to Cm/s.
- Some vehicles along super highways in the Philippines run at almost break-neck speed of 80 km/h. What is the speed in miles per hour (mi/h)? Conversion factor: 1.609 km = 1 mileRocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of 440.47 m/s in 1.83 seconds, then what is the distance (m) that the sled travels? Round off only on the final answer expressed in 3 decimal places.A runner in a 5 km trail race reaches the finish line in 31.7 minutes. What was the runners average velocity (in km/hr) if the straight-line distance from start to finish is 3.41 km [round your final answer to two decimal places]?
- At the scene of a car accident, the forensic investigator measured the skid marks from one of the vehicles to be 83 m long. He also knows the typical acceleration for a car when you slam on the brakes is -4 m/s2. The speed limit for this area is 100 km/hr (about 28 m/s). Was the car speeding before it hit the brakes?A car has acceleration of 1.20 m/s2 and starts from 2.50 m/s. What is its speed after 5.00 seconds, in m/s? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed.An object moves along a straight line such that, after t minutes, its distance from its starting point is D = 20t + 5 / (t + 1) meters. Determine the speed, in m/min will it be moving at the end of 4 minutes.