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Dafna11 [192]
3 years ago
12

Two cars go around a banked curve at the proper speed for the banking angle. One car has tires with excellent traction, while th

e other car has bald slippery tires. Which of these cars is more likely to slide on the pavement as it goes around the curve?
Physics
1 answer:
arlik [135]3 years ago
8 0

Answer:

No car will slide

Explanation:

Neither car will slide because proper bank does not required frictional forces.  To prevent the car from traction through curve, a component of normal forces provides necessary centripetal forces. which prevent them to slide.

No car will slide since both car are going with the proper speed for given  banking angle

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A bicycle wheel of radius 14 cm is mounted at the middle of an axle 96 cm long. The tire and rim weigh 23 N. The wheel is spun a
ollegr [7]

Answer:

a. L =3.465 J.s

b. 3.186 rad/s

c. T =  1.972 s

d. Lp = 0.022 J.s; up or down, depending on the direction of L

Explanation:

(a)We have the formula for angular momentum as

L = I*w where I = moment of inertia = M*R^2

L = (23/9.81) * 0.14^2* (24*pi) J.s = 3.465 J.s

(b) ω = M*g*D/L

where D = L/2 = 0.96/2 = 0.48m

ω = (23* 0.48/3.465) rad/s = 3.186 rad/s

(c) T = 2π/ω

T = 2*π/3.186 s = 1.972 s

(d) Lp = M*D^(2*w)

Solving with mass M, D and angular velocity ω

Lp = 0.022 J.s; up or down, depending on the direction of L

8 0
3 years ago
Suppose a skydiver jumps out of a plane at 15,000 meters above the ground. It takes him 2.0 seconds to pull the cord to deploy t
Evgesh-ka [11]

Answer:

The time he can wait to pull the cord is 41.3 s

Explanation:

The equation for the height of the skydiver at a time "t" is as follows:

y = y0 + v0 · t + 1/2 · g · t²

Where:

y = height at time "t".

y0 = initial height.

v0 = initial velocity.

t = time.

g = acceleration due to gravity (-9.8 m/s² considering the upward direction as positive).

First, let´s calculate how much time will it take for the skydiver to hit the ground if he doesn´t activate the parachute.

When he reaches the ground, the height will be 0 (placing the origin of the frame of reference on the ground). Then:

y = y0 + v0 · t + 1/2 · g · t²

0 m = 15000 m + 0 m/s · t - 1/2 · 9.8 m/s² · t²

0 m = 15000 m - 4.9 m/s² · t²

-15000 m / -4.9 m/s² = t²

t = 55.3 s

Then, if it takes 4.0 s for the parachute to be fully deployed and the parachute has to be fully deployed 10.0 s before reaching the ground, the skydiver has to pull the cord 14.0 s before reaching the ground. Then, the time he can wait before pulling the cord is (55.3 s - 14.0 s) 41.3 s.

6 0
3 years ago
Scientists think that a few hundred million years or so after the Big Bang, space cooled off enough for matter to form. This mat
Eva8 [605]
This matter spread out around theuniverse with no structure. But each little bit of matter exerted the force of gravity on each other little bit. Gravity is the only type of force connected with <span>the Big Bang as it is a basic force that was to create our world in th way we can see and discover it today.</span>
6 0
3 years ago
Read 2 more answers
A scientist performed an investigation involving a reaction that produce AI 2 (SO 4) 3 how many sulfur atoms are represented in
Korvikt [17]

The Answer is D

Because you add all of them to equal 9 atoms

5 0
3 years ago
Read 2 more answers
a car with a mass of 2,000 kilograms is moving around a circular curve at a uniform velocity of 25 meters per second. the curve
Ber [7]
Fc=mv^2/r so we get 

2000kg*(25m/s)^2/(80m)= 15625N of force 

hope this helps! Thank You!!

4 0
3 years ago
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