4. When Tina went for a walk, she covered the first 300 m in 100 s and the next 200 m in 150 s. What was Tina's average speed?
A 1 m/s
B 2 m/s
C 3 m/s
D 5 m/s

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?

If anyonee has done the momentum lab practical in physics can you give me the answers i am s lostt rnn : (

Adiagram show how a converging lens can produce a real image and virtual image