Search results for "Centripetal Acceleration"

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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

Edexcel2021

*P67096A0932* Turn over PMT (b) (i) The ISS completes one orbit in 92 minutes. Calculate the centripetal acceleration of the ISS. r = 6800 km (3) ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... Centripetal acceleration = ....................................................... (ii) Astronauts in the ISS are often described as being “weightless”. Discuss whether the astronauts are “weightless” when they are orbiting the Earth in the ISS. (4) ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... (Total for Question 11 = 9 marks)

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