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Physics

CAIE2024

A metal wheel consists of an axle A, eight spokes and a rim, as shown in Fig. 1.1. spoke axle A rim X Fig. 1.1 Point X is on the rim at the end of one of the spokes. The rim has a radius of 0.85 m. The wheel is rotating clockwise with an angular speed of 140 rad s–1. (a) For point X, determine: (i) the speed speed = ................................................ m s–1 [2] (ii) the centripetal acceleration. acceleration = ................................................ m s–2 [2] (cid:300)(cid:205)(cid:266)(cid:190)(cid:288)(cid:180)(cid:237)(cid:200)(cid:245)(cid:207)(cid:298)(cid:197)(cid:266)(cid:222)(cid:252)(cid:183)(cid:256)(cid:215) © UCLES 2024 (cid:300)(cid:236)(cid:185)(cid:250)(cid:209)(cid:299)(cid:261)(cid:239)(cid:228)(cid:250)(cid:265)(cid:181)(cid:229)(cid:174)(cid:245)(cid:249)(cid:272)(cid:258) 9702/42/O/N/24 (cid:293)(cid:213)(cid:213)(cid:277)(cid:181)(cid:181)(cid:293)(cid:245)(cid:229)(cid:197)(cid:181)(cid:261)(cid:197)(cid:181)(cid:229)(cid:245)(cid:213)(cid:213) NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD PMT * 0000800000005 *

Question

Physics

Edexcel2022

*P69306A01728* Turn over PMT (b) The motor rotates at 500 revolutions per minute. Calculate the angular speed ω of the motor. (2) ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ω = ....................................................... (c) The table shows how the turning effect exerted on a load varies with ω for a particular distance between the copper disc and the plastic disc. ω / rad s−1 Turning effect / N cm

Question

Physics

Edexcel2020

The blade of a lawnmower rotates at a speed of 50 revolutions per second. Which of the following is the angular speed of the blade in rads s−1? A 7.96 B 15.9 C 157 D 314 (Total for Question 9 = 1 mark)

Question