A car moving at 37 km/h negotiates a 150 m -radius banked turn
designed for 60...
A car moving at 37 km/h negotiates a 150 m -radius banked turn
designed for 60 km/h. What coefficient of friction is needed to
keep the car on the road?
A curve of radius 40 m is banked for a design speed of 60 km/h.
If the coefficient of static friction is 0.30 (wet pavement), at
what range of speeds can a car safely make the curve?
minimum
maximum
A curve of radius 90 m is banked for a design speed of 100 km/h.
If the coefficient of static friction is 0.30 (wet pavement), at
what range of speeds can a car safely make the curve?
A curve of radius 69 m is banked for a design speed of 78 km/h.
If the coefficient of static friction is 0.30 (wet pavement), at
what range of speeds can a car safely make the curve? [Hint:
Consider the direction of the friction force when the car goes too
slow or too fast.]
A curve of radius 69 m is banked for a design speed of 80 km/h .
if the coefficient of static friction is 0.33 (wet pavement) at
what range of speeds can a car safely make the curve?
A curve of radius 70 m is banked for a design speed of 100 km/h
. If the coefficient of static friction is 0.33 (wet pavement), at
what range of speeds can a car safely make the curve?
A curve of radius 69 mm is banked for a design speed of 76
km/hkm/h .
Part A
If the coefficient of static friction is 0.28 (wet pavement), at
what range of speeds can a car safely make the curve?
[Hint: Consider the direction of the friction force when
the car goes too slow or too fast.]
Express your answers using two significant figures. Enter your
answers numerically separated by a comma.
A curve of radius 30 m is banked so that a 950 kg car travelling
at
40 km/h can go round it even if the road is so icy that the
coefficient of static friction is approximately zero. You are
commissioned to tell the local police the range of speeds at which
a car can travel around this curve without skidding. Neglect the
effects of air drag and rolling friction. If the coefficient of
static friction is 0.3, what is...
A 1,000-kg car moving east at 90 km/h collides head-on with a
1,500-kg car moving west at 50 km/h, and the two cars stick
together. (a) Which way does the wreckage move and with what
initial speed? (b) How much KE is lost in the collision?
A car drives around a curve with radius 420 m at a speed of 37
m/s. The road is banked at 5.4°. The mass of the car is 1500 kg.
(a) What is the frictional force on the car? (b) At what speed
could you drive around this curve so that the force of friction is
zero?
A car of mass 1110 kg enters a banked turn with a banking angle
of 11.1° and a radius of 300 m at a speed of 30.0 m/s. The
coefficient of static friction between the car’s wheels and the
pavement is 0.0881. The turn covers a total of 1 45°.
(a) If the car experiences a drag force that of D=kv where
k=32.0kg/s, how much thrust must the car provide to maintain
constant velocity in the turn?
(b) If the...