Chapter 9 – Circular Motion
A heavy mass is attached to a thin wire and is whirled in a vertical circle. The wire is most likely to break 1. when the mass is at the highest point 2. when the mass is at the lowest point 3. when the wire is horizontal 4. at an angle of cos^−1(1/3) from the upward vertical.
21
Oct
A heavy mass is attached to a thin wire and is whirled in a vertical circle. The wire is most likely to break 1. when the mass is at the highest point 2. when the mass is at the lowest point 3. when the wire is horizontal 4. at an angle of cos^−1(1/3) from the [...]
A body crosses the topmost point of a vertical circle with a critical speed. Its centripetal acceleration, when the string is horizontal will be
21
Oct
A body crosses the topmost point of a vertical circle with a critical speed. Its centripetal acceleration, when the string is horizontal will be A body crosses the topmost point of a vertical circle with a critical speed. Its centripetal acceleration when the string is horizontal will be October 21, 2020 Category: Cengage NEET by [...]
A 1kg stone at the end of 1m long string is whirled in a vertical circle at a constant speed of 4m/s. The tension in the string is 6N, when the stone is at (g=10m/s^2)
21
Oct
A 1kg stone at the end of 1m long string is whirled in a vertical circle at a constant speed of 4m/s. The tension in the string is 6N, when the stone is at (g=10m/s^2) A 1kg stone at the end of 1m long string is whirled in a vertical circle at a constant speed [...]
A circular road of radius r is banked for a speed v=40 km/hr. A car of mass m attempts to go on the circular road. The friction coefficient between the tyre and the road is negligible. 1. the car cannot make a turn without skidding. 2. If the car turns at a speed less than 40 km/hr, it will slip down 3. If the car turns at the correct speed of 40 km/hr, the force by the road on the car is equal to mu^2/r 4. If the car turns at the correct speed of 40 km/hr, the force by the road on the car is greater than mg as well as greater than `(mu^2)/r
21
Oct
A circular road of radius r is banked for a speed v=40 km/hr. A car of mass m attempts to go on the circular road. The friction coefficient between the tyre and the road is negligible. 1. the car cannot make a turn without skidding. 2. If the car turns at a speed less than [...]
A car of mass M is moving on a horizontal circular path of radius r. At an instant its speed is v and is increasing at a rate a. 1. The net acceleration of the car is towards the centre of its path. 2. The magnitude of the frictional force on the car is greater than Mv^2/R. 3. The friction coefficient between the ground and the car in not less than βg. 4. The friction coefficient between the ground and the car is theta = tha^-1 v^2/Rg.
21
Oct
A car of mass M is moving on a horizontal circular path of radius r. At an instant its speed is v and is increasing at a rate a. 1. The net acceleration of the car is towards the centre of its path. 2. The magnitude of the frictional force on the car is greater [...]
A body moves on a horizontal circular road of radius r, with a tangential acceleration at. The coefficient of friction between the body and the road surface Is μ. It begins to slip when its speed is v. (i) v^2=μrg (ii) μg=(v^4/r^2)+at) (iii) μ^2g^2=(v^4r^2+a^2t (iv) The force of friction makes an angle tan−1(v^2/atr) with the direction of motion at the point of slipping.
21
Oct
A body moves on a horizontal circular road of radius r, with a tangential acceleration at. The coefficient of friction between the body and the road surface Is μ. It begins to slip when its speed is v. (i) v^2=μrg (ii) μg=(v^4/r^2)+at) (iii) μ^2g^2=(v^4r^2+a^2t (iv) The force of friction makes an angle tan−1(v^2/atr) with the [...]
A point moves along an arc of a circle of radius R. Its velocity depends on the distance covered s as v=s√, where a is a constant. Find the angle α between the vector of the total acceleration and the vector of velocity as a function of s.
21
Oct
A point moves along an arc of a circle of radius R. Its velocity depends on the distance covered s as v=s√, where a is a constant. Find the angle α between the vector of the total acceleration and the vector of velocity as a function of s. A point moves along an arc of [...]
A particle moves in a circle of radius 30cm. Its linear speed is given by v=2t, where t in second and v in m/s. Find out its radial and tangential acceleration at t=3s.
21
Oct
A particle moves in a circle of radius 30cm. Its linear speed is given by v=2t, where t in second and v in m/s. Find out its radial and tangential acceleration at t=3s. A particle moves in a circle of radius 30cm. Its linear speed is given by v=2t where t in second and v [...]
A car is moving on a circular road of radius 100m. At some instant its speed is 20m/s and is increasing at the rate of 3m/s^2. The magnitude of its acceleration is
21
Oct
A car is moving on a circular road of radius 100m. At some instant its speed is 20m/s and is increasing at the rate of 3m/s^2. The magnitude of its acceleration is A car is moving on a circular road of radius 100m. At some instant its speed is 20m/s and is increasing at the [...]
A ring of radius r and mass per unit length m rotates with an angular velocity ω in a free space. The tension in the ring is:
21
Oct
A ring of radius r and mass per unit length m rotates with an angular velocity ω in a free space. The tension in the ring is: A ring of radius r and mass per unit length m rotates with an angular velocity ω in a free space. The tension in the ring is: October [...]