Question

1. (a) If a force of 240 N is applied to an object of mass 8 kg and there is no frictional forces opposing the motion, calculate its acceleration.
(b) If the object starts from rest, find it's velocity after 4 seconds.
2. Calculate the force needed to give a mass of 5 kg an acceleration of
(a) 2 m/s^2
(b) 10 cm/s ^2
(c) 5 km/s^2
3. A force of 12 N is used to move a box of mass 20 kg along the ground. If there is a constant frictional force of 4.0 N opposing the motion, what will be the acceleration of the box?
4. A trolley of mass 1.5 kg is pulled by an elastic cord and is given an acceleration of 2.0 m/s^2. Find the frictional force acting on the trolley if the tension in the elastic cord is 5 N.
5. Calculate the momentum of an object if:
(a) its mass is 4.0 kg and its velocity is 8.0 m/s
(b) its mass is 500 g and its velocity is 3.0 km/s

Answer 1

Answer:

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Explanation:

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