Question 7 [1 point} Forces of 2.5 N and 2.5 N act on an object at right angles to one another. What is the magnitude of a third force acting on the same object so that it remains stationary? Question 8 [1 point} For an object travelling with uniform circular motion, 0 its acceleration is always directed tangent to the circle 0 its velocity is always directed toward the centre of the circle 0 its speed and distance from the centre of the circle are constant 0 its speed may change provided the radius of the circle is constant 0 its velocity is constant Question 9 [1 point} Imagine that you are travelling in a train and you have a drink sitting on the dining table in front of you. The train suddenly stops and the drink ends up in your lap. What force acting on the drink is responsible for its sudden motion? 0 The force of the track acting on the wheels 0 The force of the wheels acting on the track 0 The force of gravity acting on the drink. 0 There is no force acting on the drink that is responsible for its motion. 0 The force of the table acting on the drink