IN A 100M RACE, THE WINNER CROSSES THE FINISHING LINE IN 10S. THE RUNNER UP TAKES 10.20 SECONDS. ESTIMATE THE DISTANCE BETWEEN THE WINNER AND THE RUNNER UP AS THE WINNER CROSSES THE LINE. SHOW YOUR METHOD OF WORKING. B-EXPLAIN WHY YOUR ANSWER CAN ONLY BE AN ESTIMATE.

Um vetor representa um deslocamento cujo módulo é 20 m. se v faz um ângulo de 60 graus com a horizontal, qual é o valor das componentes horizontal e vertical deste vetor?

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.