# physics

Francesca, who likes physics experiments, dangles her watch from a thin piece of string while the jetliner she is in takes off from JFK Airport. She notices that the string makes an angle of 25° with respect to the vertical as the aircraft accelerates for takeoff, which takes about 18 s. Estimate the takeoff speed of the aircraft.

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posted by hgy
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What follows is a calculated question with 1 blanks. A box is given a push so that it slides across the floor. Given that the coefficient of kinetic friction is 0.4 and the push imparts an initial speed of 2.6 m/s, the total distance travelled by the box is m.

posted by Amukelani

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