A train is travelling at 50 ms-1 when the driver applies the brakes and gives the train a constant deceleratic of magnitude 0.50 ms-2 for 100 s. Describe what happens to the train. Calculate the distance travelled by the train in 100 s

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

An alien spaceship is 500 m above the ground and moving at a constant velocity of 150 m/s upwards. how high above the ground is the ship after 5 seconds?