Question
If friction can provide necessary centripetal force, why should the road be banked?
✓
Answer
Friction depends on the nature of the surface and so is highly varying and not dependable.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following is the most precise device for measuring length:
a vernier callipers with 20 divisions on the sliding scale.
a vernier callipers with 20 divisions on the sliding scale.
Answer the following questions based on the P-T phase diagram of carbon dioxide
- At what temperature and pressure can the solid, liquid and vapour phases of CO2 co-exist in equilibrium ?
- What is the effect of decrease of pressure on the fusion and boiling point of CO2?
- What are the critical temperature and pressure for CO2? What is their significance?
- Is CO2 solid, liquid or gas at (a) –70 °C under 1 atm, (b) –60 °C under 10 atm, 15 °C under 56 atm?
A particle is projected in air at an angle $\beta$ to a surface which itself is inclined at an angle $\alpha$ to the horizontal (Fig.).
→
- Find an expression of range on the plane surface (distance on the plane from the point of projection at which particle will hit the surface).
- Point P at which particle hits the plane can be seen as intersection of its trajectory (parobola) and straight line. Remember particle is projected at an angle $(\alpha+\beta)$ w.r.t. horizontal.
- We can take x-direction along the plane and y-direction perpendicular to the plane. In that case resolve g (acceleration due to gravity) in two differrent components, gx along the plane and gy perpendicular to the plane. Now the problem can be solved as two independent motions in x and y directions respectively with time as a common parameter.)
Is it possible for a current loop to stay without rotating in a uniform magnetic field? If yes, what should be the orientation of the loop?
For the harmonic travelling wave $\text{y}=2\cos2\pi(10\text{t}-0.0080\text{x}+3.5)$ where x and y are in cm and t is second. What is the phase difference between the oscillatory motion at two points separated by a distance of:
$\frac{\lambda}{2}$
→$\frac{\lambda}{2}$
A physical quantity $\text{X}=\frac{\text{a}^2\text{b}^{\frac{-3}{2}}}{\text{c}^4}$ A student says that the relative error in $2\frac{\Delta\text{a}}{\text{a}}-\frac{3}{2}\frac{\Delta\text{b}}{\text{b}}-4\frac{\Delta\text{c}}{\text{c}}.$ Do you agree with the student? If not, what is the relative error in X?
→A satellite revolving around earth loses height. How will its time period be changed?
The ratio of vapour densities of two gases at the same temperature is 6 : 9. Compare the r.m.s. velocities of their molecules.
What is the principle of homogeneity of dimensions?
A bolt of mass 0.3kg falls from the ceiling of an elevator moving down with an uniform speed of 7ms-1. It hits the floor of the elevator (length of the elevator = 3m) and does not rebound. What is the heat produced by the impact? Would your answer be different if the elevator were stationary?