Consider a 2100-kg car cruising at a constant speed of 70 km/h. Now, the car starts...
Consider a 2100-kg car cruising at a constant speed of 70 km/h. Now, the car starts to pass another car by accelerating to 110 km/h in 12 s. Determine the additional power needed to achieve this acceleration. What would your answer be if the total mass of the car were only 700 kg?
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Consider a 2100-kg car cruising at a constant speed of 70 km/h.
Now, the car starts...
A 1000 kg race car starts from rest and reaches a speed of 100 km/h in...
A 1000 kg race car starts from rest and reaches a speed of 100 km/h in 20 s. What is the power delivered by the car’s engine? (2 points). A 1 kg mass is released from the top of a smooth slide of height 2m. At the bottom of the slide the mass slides on a horizontal surface and stops at a distance of 5 m. What is the coefficient of kinetic friction of the horizontal surface? (3.5 points). The...
A speeding car is traveling along a straight road with a constant speed of 100 km/hour....
A speeding car is traveling along a straight road with a constant speed of 100 km/hour. It passes a police car. The police car starts 5.00 s after the speeder passes. The police car accelerates uniformly (i.e. at constant acceleration) for 10.0 s, at the end of which its speed is 120 km/hour. After that, the police car moves with the constant speed of 120 km/hour till it reaches the speeding car. a) How far ahead of the police car...
A speeding driver with a constant speed of 90.0 km/h passes a stopped police car. The...
A speeding driver with a constant speed of 90.0 km/h passes a stopped police car. The police car immediately takes off after him and accelerates with a constant acceleration of 5.0 m/s2. The time needed for the police car to overtake the speeding driver is closest to …
A driver is traveling at a speed of 70 km/h in car A when he looks...
A driver is traveling at a speed of 70 km/h in car A when he looks down to text a friend that he is running late. Just before he looks down. he is 80 m from an intersection, and a bicydist B, traveling at a constant speed of 10m/s,s d= 40 m from that same intersection. The light turns red during the 3 s text, and when the driver looks up, he hits the brakes, causing a constant deceleration of...
A speeder traveling at a constant speed of 99 km/h races past a billboard. A patrol...
A speeder traveling at a constant speed of 99 km/h races past a billboard. A patrol car pursues from rest with constant acceleration of (9 km/h)/s until it reaches its maximum speed of 161 km/h, which it maintains until it catches up with the speeder. How long does it take the patrol car to catch the speeder if it starts moving just as the speeder passes? Answer in units of s. How far does each car travel? Answer in units...
A 700 kg elevator starts from rest. It moves upward for 5.00 s with constant acceleration...
A 700 kg elevator starts from rest. It moves upward for 5.00 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. (b) How does this power compare with the motor power when the elevator moves at its cruising speed? Pcruising = 12400 Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy...
A car travels at a constant velocity of 90 km/h along an expressway under-ambient temperature and...
A car travels at a constant velocity of 90 km/h along an
expressway under-ambient temperature and pressure conditions. The
width of the car is 1.5 m while its height is 1.2 m. The wheelbase
(length between the front and rear wheels) is 2.5 m. The drag
coefficient is 0.22.
[Use
air, ambient density of the air = 1.12 kg/m3 and,
fuel, density of the fuel = 930 kg/m3. You may neglect
any energy contained in the exhaust gases and any...
While driving your car at a constant speed of 56.2 km/h, you encounter a dip in...
While driving your car at a constant speed of 56.2 km/h, you encounter a dip in the road that can be approximated as a circle with a radius of 75.0 m. If your mass is 67.5 kg, what is the normal force acting on you at the bottom of the dip
A 1300 kg sports car accelerates from rest to 70 km/h in 7.4 s. What is...
A 1300 kg sports car accelerates from rest to 70 km/h in 7.4 s. What is the average power in Watts delivered by the engine?
A car moving with a constant speed of 85 km/h enters a circular, flat curve with...
A car moving with a constant speed of 85 km/h enters a circular, flat curve with a radius of curvature of 0.40 km. If the friction between the road and the car’s tires can support a centripetal acceleration of 1.25 m/s2, without slipping, does the car navigate the curve safely, or does it fly off the road?
A driver is traveling at a speed of 70 km/h in car A when he looks down to text a friend that he is running late. Just before he looks down. he is 80 m from an intersection, and a bicydist B, traveling at a constant speed of 10m/s,s d= 40 m from that same intersection. The light turns red during the 3 s text, and when the driver looks up, he hits the brakes, causing a constant deceleration of...
A car travels at a constant velocity of 90 km/h along an
expressway under-ambient temperature and pressure conditions. The
width of the car is 1.5 m while its height is 1.2 m. The wheelbase
(length between the front and rear wheels) is 2.5 m. The drag
coefficient is 0.22.
[Use
air, ambient density of the air = 1.12 kg/m3 and,
fuel, density of the fuel = 930 kg/m3. You may neglect
any energy contained in the exhaust gases and any...
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