The engine in an imaginary sports car can provide constant power to the wheels over a range of speeds from 0 to 70 miles per hour (mph). At full power, the car can accelerate from zero to 32.0 mph in time 1.20 s. At full power, how long would it take for the car to accelerate from 0 to 64.0 mph ? Neglect friction and air resistance. Express your answer in seconds. ▸ View Available Hint(s) 4.80 s Submit ✓ Correct Of course, neglecting friction, especially air friction, is completely unrealistic at such speeds. Part B Previous Answers A more realistic car would cause the wheels to spin in a manner that would result in the ground pushing it forward with a constant force (in contrast to the constant power in Part A). If such a sports car went from zero to 32.0 mph in time 1.20 s how long would it take to go from zero to 64.0 mph? Express your answer numerically, in seconds. ▸ View Available Hint(s) LIVE] ΑΣΦΑ 4.80 ? S

Fleas have remarkable jumping ability. A 0.55 mg flea, jumping straight up, would reach a height of 30 cm if there were no air resistance. In reality, air resistance limits the height to 20 cm .   What is the flea's kinetic energy as it leaves the ground? Express your answer with the appropriate units. K=?   At its highest point, what fraction of the initial kinetic energy has been converted to potential energy? f=?

A mother has four times the mass of her young son. Both are running with the same kinetic energy. ▼ Part A What is the ratio vs/vm other of their speeds? Us/Um = [ΠΙ ΑΣΦ ?

Can you please provide the complete solutions for letters a and b. Also provide an FBD for this.

A crate with mass m = 33.3 kg being pushed up an incline that makes an angle φ = 22.7 degrees with horizontal. The pushing force is horizontal, with magnitude P, and the coefficient of kinetic friction between the crate and the incline is μ = 0.358. Consider the work done on the crate as it moves a distance d = 5.32 m at constant speed. a. What is work done by the pushing force, in joules?  b. What is the work done by friction, in joules?  c. What is the work done by gravity, in joules?  d. What is the net work, in joules?

Computation. A block is released from rest at the top of a 47-m long frictionless ramp inclined at 34° above the horizontal. What is the block's speed at the bottom of the ramp? v= m/s Record your numerical answer below, assuming three significant figures. Remember to include a "-" if/when necessary.

A 3.50 kg block is pulled up a frictionless inclined plane by a 60.0 N force that is parallel to the plane, starting from rest.The normal force on the block from the plane has magnitude 15.2 N.What is the block's speed when its displacement up the ramp is 3.40 m? Number i Units

See photo x = 36.0 m, y = 38.2 m, z = 43.2 m a. Assuming the track is frictionless, what is the minimum speed required at Point A for the roller-coaster to reach Point B? b. If the roller-coaster starts at Point A with this speed, how fast will it be going when it reaches Point B? c. What will be the maximum speed of the roller-coaster during this part of its trip?

A car has an engine that produces constant power. The car is accelerated from rest at t = 0, and at t = t0 the acceleration is a0. What is the acceleration of the car at = 4t0?

A freight elevator weighs 6200 N. What is the power required to raise the elevator a. What a distance of 20 meters in 10 seconds? b. One of the motors for the freight elevator system goes out. Now the maximum power available to move the 6200 N freight elevator is 10 kW. How long does it take to raise the elevator 20 meters now?