ROTATIONAL MOTION | Baamboozle - Baamboozle | The Most Fun Classroom Games!

English 22 Public

Rotational and circular motion.

Study Slideshow

What is the magnitude of the centripetal acceleration of a car following a curve of radius 400 m at a speed of 20.0 𝑚𝑠^(−1)

1 m/s^2

15

The magnitude of the centripetal (radial) acceleration is

ac = mv^2/r

10

An athlete weighing 980 N is running a curve at a speed of 5 m𝑠^(−1) in an arc. The radius of curvature of arc is 7 m. Find the centripetal force acting on him. Which force provides the centripetal force?

357.4 N, Friction.

15

What is the angle of banking which would allow vehicles to round a curve of 900 ft radius at 40 mph without friction ?

6.8 degree

15

When the angular velocity is increasing, the angular acceleration vector points -----------.

in the same direction as the angular velocity vector

15

The tangential acceleration 𝑎_𝑇 relates to angular acceleration α (measured in radian per second squared) by the equation-----.

𝑎T = r α

10

Relation between The linear velocity (tangential velocity) ‘v’ and the angular velocity

v = r 𝜔

10

A wheel rotates with a constant angular acceleration of 3.50 rad𝑠−𝟐 . (a) If the angular speed of the wheel is 2.00 rad 𝑠−𝟏 at 𝑡𝑖 = 0, through what angular displacement does the wheel rotate in 2.00 s?

11 rad (or) 1.75 rev

15

Circular motion is a specific type of a -------- motion

two- dimensional

10

The object rotates around an axis in ---------- motion.

rotational

15

The angle through which an object in rotation moves, measured in degree or radians is -----------.

angular displacement

15

An object is moving in a COUNTERCLOCKWISE circle at constant speed. What is the direction of the acceleration at point B?

left (towards the center)

15

A roller coaster car (mass = M) is on a track that forms a circular loop (radius = r) in the vertical plane. If the car is to just maintain contact with the track at the top of the loop, what is the minimum value for its speed at that point

(rg)1/2

15

A stone, of mass m, is attached to a strong string and whirled in a vertical circle of radius r. At the exact top of the path the tension in the string is 3 times the stone's weight. The stone's speed at this point is given by

2(gr)1/2

15

An object is moving in a COUNTERCLOCKWISE circle at constant speed. What is the direction of the velocity vector at point B?

up

15

A car goes around a flat curve of radius 50 m at a speed of 14 m/s. What must be the minimum coefficient of friction between the tires and the road for the car to make the turn?

0.4

15