12. A 1,000 kg car moves at 5 m / s when the brakes are applied,...
Homework Answers
1. A roller coaster has a 300 kg car. Assume the track is frictionless. a) The...
1. A roller coaster has a 300 kg car. Assume the track is frictionless. a) The car starts at a speed 20 m/s on a horizontal track. It then goes through a circular loop. What is the speed of the car when it is at the top of the loop, h = 10 m above the horizontal track? b) What is the normal force applied from the track at the point? Does this force point upward or downward? Assume the...
An object with a mass, m = 5 kg, is released from rest at the top...
An object with a mass, m = 5 kg, is released from rest at the top of the ramp. The length of the ramp is 2.3 m. The object slides down the ramp reaching a speed of 2.1 m/s at the bottom. a) If the friction force between the ramp and the object is 3 N, find the angle between the ramp and the horizontal theta (in degrees). b) What speed (in m/s) does the object reach at the bottom...
3. An engine exerts a force of 10000 N on a 1000 kg car travelling over...
3. An engine exerts a force of 10000 N on a 1000 kg car travelling over a flat road. The force (overcoming friction) accelerates the car from rest such that it travels a distance of 50 m in 5 s Find e. the net acceleration of the car, f. normal force exerted by the road on the car, and g. the coefficient of kinetic friction between the car and the road? 4. A 10 kg block is initially at rest...
A 1,210 kg car going 32 m/s is brought to a stop using its brakes. Let's...
A 1,210 kg car going 32 m/s is brought to a stop using its brakes. Let's assume that a total of approximately 28 kg of iron in the brakes and wheels absorbs the heat produced by the friction. (a)What was the car's original kinetic energy (in J)? ________J (b)After the car has stopped, what is the change in temperature (in °C) of the brakes and wheels? ________ °C
Question 181 A car moving at 20 m/s brakes and slides to a stop. If the...
Question 181 A car moving at 20 m/s brakes and slides to a stop. If the coefficient of kinetic friction between the pavement and the tires of the car is 0.1, how far does the car slide? O A. 50 m O B. 100 m O C. 200 m O D. 400 m
A 6.80 × 103-kg car is travelling at 29.7 m/s when the driver decides to exit...
A 6.80 × 103-kg car is travelling at 29.7 m/s when the driver decides to exit the freeway by going up a ramp. After coasting 355 m along the exit ramp the car\'s speed is 13.5 m/s, and it is h = 12.5 m above the freeway. What is the magnitude of the average drag force exerted on the car?
An 850 kg car can roll up and down a ramp at an angle of theta...
An 850 kg car can roll up and down a ramp at an angle of theta = 45.0 degree to the ground. It is connected, by a massless tow rope that runs over a frictionless pulley, to a heavy spring of spring constant k = 35.0 kN/m, as shown in the figure to the right. The car handbrake is released when the car is at rest, with the spring in its unstretched state. Assume the rolling motion of the car...
A car of mass 875 kg is traveling 30.0 m/s when the driver applies the brakes,...
A car of mass 875 kg is traveling 30.0 m/s when the driver applies the brakes, which lock the wheels. The car skids for 5.60 s in the positive -direction before coming to rest. (a) What is the car's acceleration? (b) What magnitude force acted on the car during this time? (c) How far did the car travel? [Ans: ()-536 m/s (b) 4690 N(c) 84,0 m]
A car of mass 772 kg is traveling 24.4 m/s when the driver applies the brakes,...
A car of mass 772 kg is traveling 24.4 m/s when the driver applies the brakes, which lock the wheels. The car skids for 5.27 s in the positive x-direction before coming to rest. a). What is the car's acceleration (in m/s2)? (Indicate the direction with the sign of your answer.) b). What magnitude force (in N) acted on the car during this time? c). How far (in m) did the car travel?
2.10 A car is going 35 m/s when the driver applies the brakes. a) If the...
2.10 A car is going 35 m/s when the driver applies the brakes. a) If the braking acceleration is −5.7 m/s2 , how far will the car go as its velocity drops from 35 m/s to 22 m/s? b) How much time will the change from 35 m/s to 22 m/s take? 2.11 As hockey puck slides to a stop, it goes 40 m across the ice in 3.7 s. a) What was the initial velocity of the puck? b)...
1. A roller coaster has a 300 kg car. Assume the track is frictionless. a) The car starts at a speed 20 m/s on a horizontal track. It then goes through a circular loop. What is the speed of the car when it is at the top of the loop, h = 10 m above the horizontal track? b) What is the normal force applied from the track at the point? Does this force point upward or downward? Assume the...
An object with a mass, m = 5 kg, is released from rest at the top of the ramp. The length of the ramp is 2.3 m. The object slides down the ramp reaching a speed of 2.1 m/s at the bottom. a) If the friction force between the ramp and the object is 3 N, find the angle between the ramp and the horizontal theta (in degrees). b) What speed (in m/s) does the object reach at the bottom...
3. An engine exerts a force of 10000 N on a 1000 kg car travelling over a flat road. The force (overcoming friction) accelerates the car from rest such that it travels a distance of 50 m in 5 s Find e. the net acceleration of the car, f. normal force exerted by the road on the car, and g. the coefficient of kinetic friction between the car and the road? 4. A 10 kg block is initially at rest...
Question 181 A car moving at 20 m/s brakes and slides to a stop. If the coefficient of kinetic friction between the pavement and the tires of the car is 0.1, how far does the car slide? O A. 50 m O B. 100 m O C. 200 m O D. 400 m
An 850 kg car can roll up and down a ramp at an angle of theta = 45.0 degree to the ground. It is connected, by a massless tow rope that runs over a frictionless pulley, to a heavy spring of spring constant k = 35.0 kN/m, as shown in the figure to the right. The car handbrake is released when the car is at rest, with the spring in its unstretched state. Assume the rolling motion of the car...
A car of mass 875 kg is traveling 30.0 m/s when the driver applies the brakes, which lock the wheels. The car skids for 5.60 s in the positive -direction before coming to rest. (a) What is the car's acceleration? (b) What magnitude force acted on the car during this time? (c) How far did the car travel? [Ans: ()-536 m/s (b) 4690 N(c) 84,0 m]
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