Centripetal Acceleration Flashcards
True or False?
In centripetal acceleration,
The linear velocity of the moving object shown is constantly changing
Newton’s first and second laws tell us that the object must be accelerating if its velocity is constant
The acceleration is never towards the centre of the circle
Centripetal is a type of acceleration or force
True
False
False
False
A car moves at 13 ms-1 round a bend of radius 35 m.
What is its centripetal acceleration?
Velocity: 13 m s-1 Radius: 35 m acceleration, a = velocity2 ÷ radius = 132 ÷ 35 = 4.8 m s-2
Calculate the centripetal acceleration acting on the edge of a 0.20 cm diameter tire which rotates at 45 rad s-1
1.8 ms-2
Calculate the centripetal acceleration acting on the tip of a 12 cm fan blade which rotates at 470 rad s-1
6.8 ms-2
A lasso is spun at a constant angular velocity of 3.8 rad s-1. What is the centripetal acceleration of the lasso’s tip, 1.4 m from your hand?
20 ms-2
A rock tied to a string is moving at a constant speed of 8.0 ms-1 in a circle of radius 7.0 m. What is the centripetal acceleration of the rock?
9.1 ms-2
A 1000 kg car passing the top of a hill with radius of curvature 150 m at a speed of 16 ms-1. What centripetal acceleration acts on it?
1.7 ms-2
A ball is attached to a string that is 1.5 m long. It is spun so that it completes two full rotations every second. What is the centripetal acceleration felt by the ball?
240 ms-2
Calculate the centripetal acceleration acting on a person standing on the equator (r = 6400 km).
0.034 ms-2
Calculate the centripetal acceleration acting on a child sitting 0.95 m from the centre of a playground roundabout which has a time period of 4.0 s
2.34 ms-2
Calculate the centripetal acceleration acting on the outside edge of a 12 cm CD which has a frequency of 50 Hz
19000 ms-2
A ferry boat makes a 180o turn in 12 minutes. The radius of the turn is 0.80 km. What is its centripetal acceleration during the turn?
0.015 ms-2
The centripetal acceleration of the mass on the end of the hammer thrower’s wire when it is being rotated in a circle of radius 1.5m is 500ms^-2 (=50g). What is the speed of the mass as it is whirled in this circle.
27ms^-1
