An older-model car accelerates from 0 to speed v in a time interval of ?t. A...

An older-model car accelerates from 0 to speed v in a time interval of ?t. A newer, more powerful sports car accelerates from 0 to 2v in the same time period. Assuming the energy coming from the engine appears only as kinetic energy of the cars, compare the power of the two cars.

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genius_generous answered 10 months ago

A car accelerates uniformly from rest and reaches a speed of 22.0 m/s in 9.00 s....

A car accelerates uniformly from rest and reaches a speed of 22.0 m/s in 9.00 s. If the diameter of the tire is 58.0 cm, find (a) the number of revolutions the tire makes during the motion, assuming that no slipping occurs. (b) What is the final angular speed of a tire in revolutions per second? Answer: (54.3 rev, 12.1 rev/s) --> please show me how to get this answer!

A car accelerates uniformly from rest and reaches a speed of 23.0 m/s in 8.96 s....

A car accelerates uniformly from rest and reaches a speed of 23.0 m/s in 8.96 s. Assume the diameter of a tire is 57.9 cm. (a) Find the number of revolutions the tire makes during this motion, assuming that no slipping occurs. (b) What is the final angular speed of a tire in revolutions per second? rev/s

17. For time t on the interval [0, 8], people arrive at a venue for an...

17. For time t on the interval [0, 8], people arrive at a venue for an outdoor concert at a rate modeled by A(t) = 0.3sin(1.9t) + 0.3cos(0.6t) + 1.3. For time t on the interval [0, 1], no one leaves the venue, but for t on the interval [1, 8], people leave the venue at a rate modeled by L(t) = 0.2cos(1.9t) + 0.2sin t + 0.8. Both functions A(t) and L(t) are measured in hundreds of people per...

A racing car moves on a circle of constant radius b. the speed of th car varies with time t according to v=ct where c is a positive constant.

A racing car moves on a circle of constant radius b. the speed of th car varies with time t according to v=ct where c is a positive constant. find the time t when the angle between the velocity vector and the acceleration vector is 45 degrees

A 108 m long train starts from rest (at t = 0) and accelerates uniformly. At...

A 108 m long train starts from rest (at t = 0) and accelerates uniformly. At the same time (at t = 0), a car moving with constant speed in the same direction reaches the back end of the train. At t = 12 s the car reaches the front of the train. However, the train continues to speed up and pulls ahead of the car. At t = 32 s, the car is left behind the train. Determine, the...

A projectile is ground-launched into the air at time t = 0. The initial speed is...

A projectile is ground-launched into the air at time t = 0. The initial speed is vo and the angle to the horizontal is ?. Air resistance is modeled as a drag force acting on the projectile and results in an acceleration aD = ?kv where k is a constant and v is the velocity of the projectile. If the effects of gravitational acceleration are included, a) Determine expressions for the x- and y- components of the displacement of the...

If an object accelerates for infinite time, then it will in the end reach speed of light.

I have some question about relativistic features of objects which moves with speed of light. If an object accelerates for infinite time, then it will in the end reach speed of light. Then, to make it clear, assume a rocket with infinite power source (source is also assumed to be massless) that accelerates in space, or vacuum without any disturbance in its motion. Also assume that there is another rocket same as the one mentioned above and, in vacuum, it...

Starting from rest, a car accelerates at 3m/s2 until it reaches a constant speed of 15m/s....

Starting from rest, a car accelerates at 3m/s2 until it reaches a constant speed of 15m/s. After traveling at 15m/s for 12s, the brakes are applied so that the car comes to a stop, taking 3 s to do so. (Please show formulas) A. Prepare visual overview of the situation. Your overview must include a pictorial representation that defines the coordinate system, a motion diagram, and an annotated velocity vs. time graph. B.What total distance did the car travel? C....

The figure below gives the speed v versus time t for a 0.490 kg object of...

The figure below gives the speed v versus time t for a 0.490 kg object of radius 6.50 cm that rolls smoothly down a 30

A stone is thrown vertically upward at a speed of 48.00 m/s at time t=0. A...

A stone is thrown vertically upward at a speed of 48.00 m/s at time t=0. A second stone is thrown upward with the same speed 4.050 seconds later. At what time are the two stones at the same height? Set up an equation of motion for each stone. Write the time for the second stone in terms of the time for the first stone. Solve the two equations for the unknown time.

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