A cyclist coasts up a 11.5° slope, traveling 24.0 m along the
road to the top...
A cyclist coasts up a 11.5° slope, traveling 24.0 m along the
road to the top of the hill. If the cyclist's initial speed is 9.70
m/s, what is the final speed? Ignore friction and air
resistance.
A car traveling at 34 m/s runs out of gas while traveling up a 9.0 slope Part A How far will it coast before starting to roll back down? Express your answer in meters. A piano has been pushed to the top of the ramp at the back of a moving van. The workers think it is safe, but as they walk away it begins to roll down the ramp. Neglect the friction between the piano and the ramp. Part AIf the back of...
A car initially traveling at 40 m/s runs out of gas while
traveling up a slope. It coasts for a distance of 500 m before it
starts to roll back down.
a. What is the acceleration of the car?
b. What is the angle (incline) of the slope?
c. How long does it take after the car runs out of gas before it
starts to roll back down?
d. Once the car starts rolling backwards, how long does it take...
A car is traveling along a road, and its engine is turning over
with an angular velocity of +230 rad/s. The driver steps on the
accelerator, and in a time of 8.0 s the angular velocity increases
to +270 rad/s. (a) What would have been the
angular displacement of the engine if its angular velocity had
remained constant at the initial value of +230 rad/s during the
entire 8.0-s interval? (b) What would have been
the angular displacement if the...
a car is traveling along a straight road when the car runs out
of gas. the car has an acceleration a(t)=1.1m/s^2-.02m/s^3*t and
has a velocity of 30.0m/s at t=0.
a) what is the displacement of the car between t=3.0 s and t=5.0
s?
b) at what time will the car become to rest?
c) what will be the total displacement of the car between t=0
and when it comes to rest?
5.1 A car is traveling along a highway at 65 miles per hour. The
road is horizontal (0% slope). If the wind resistance and rolling
resistance at the wheels creates a combined resistive force of 950
N, what is the power (kW) developed at the rear wheels?
5.2 How much power (kW) must the car engine in problem 5.1
develop if the overall mechanical efficiency of the transmission
and drive train is 94%?
5.3 Assume the car engine in problem...
A 4100 kg open railroad car coasts along with a constant speed
of 9.90 m/s on a level track. Snow begins to fall vertically and
fills the car at a rate of 5.00 kg/min . Ignoring friction with the
tracks, what is the speed of the car after 80.0 min ?
Consult Interactive Solution 2.22 before beginning this problem.
A car is traveling along a straight road at a velocity of +25.0 m/s
when its engine cuts out. For the next 2.25 seconds, the car slows
down, and its average acceleration is a1 . For the next 5.23
seconds, the car slows down further, and its average acceleration
is a2. The velocity of the car at the end of the 7.48-second period
is +16.5 m/s. The ratio of the average acceleration...
A skater glides along a circular path of radius 7.40 m.
1-If he coasts around one half of the circle, find the magnitude
of the displacement vector.
2-What distance has the person skated?
3-If the skater coasts only around 73 degrees of the circle,
find the magnitude of his displacement vector.
4-What distance has he skated in this case? 5-What is the
magnitude of the displacement if he skates all the way around the
circle?
a stunt driver's car is moving at 24.2 m/s along a straight
road. The road comes to an abrupt stop 21.2 m before a drop off.
The coefficient of friction of the road is 0.712, and the
coefficient of friction of the dirt between the road and the drop
off is 0.426. What is the minimum distance at which the driver can
behin to apply the brakes and still prevent himselff from going
over the edge?
A 1,954-kg car is moving up a road with a slope (grade) of 39%
while slowing down at a rate of 3.4 m/s^2. What is the direction
and magnitude of the frictional force?(define positive in the
forward direction, i.e., up the slope)?
A 2,149-kg car is moving up a road with a slope (grade) of 10%
while slowing down at a rate of 3.8 m/s^2. What is the direction
and magnitude of the frictional force?
(define positive in the forward...