A car accelerates uniformly from rest to 17.3 m/s in 7.12 s along a level stretch of road. Ignoring friction, determine the average power required to accelerate the car if (a) the weight of the car is 8.90 x 103 N, and (b) the weight of the car is 1.66 x 104 N. (a) Number i (b) Number Units Units

6. Please answer in regular notation

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If a car (m = 1200 kg) generates 18 hp when traveling at a steady 90 km/h, what must be the combined force exerted on the car due to friction and air resistance? How much power altogether must the car supply to accelerate to 100 km/h in 5.0 s?

A dart gun contains a spring of spring constant k = 16 N/m which is used to shoot a dart of mass m. The dart leaves the gun at a speed of v = 3.1 m/s after the spring is compressed 1 cm. what is the darts speed when it hits the floor (vf in m/s) if it is fired horizontally at a height of h = 2 m what angle in degree does the darts final velocity make with the horizontal?

24. (a) An object is pushed a distance 3.20 m along a frictionless horizontal table by a constant applied force of magnitude = 26.0 N directed at an angle of 25.0° below the horizontal as shown in Figure. If the mass (m) of the object is 2.50 kg calculate the work done by the applied force and power if it takes 2 minutes. d Answer: (i) The Work done by the applied force = J and (1) Power = W

The speed of a crate traveling on a horizontal frictional surface changes from vi=13 m/s to vf=11.5 m/s in a distance of d=8.5 m. (A) how long in seconds did it take for the crate to slow by this amount, assuming the acceleration is constant? (B) if the crate has a mass of 1kg, what is the power supplied to the crate by friction? (C) what is the coefficient of kinetic friction between the crate and the surface uk?

Suppose a 975-kg car can produce a useful power output of 45.5 hp (1 hp = 746 W).  (a) How long, in seconds, will it take the car to reach a speed of 15.5 m/s, neglecting friction.   (b)  How long, in seconds, will this acceleration take if the car also climbs a 2.9-m high hill in the process?

Hk=0.38. If the speed of the block v=7m/s when it leaves the inclined plane, determine the work done by the force of gravity. Take g =9.81m/s² and express your final result using one decimal place. A block of mass m=1.64kg is released from rest at an unknown height h. The coefficient of friction between the block and the incline oriented at an angle of 0=56° is m h т

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