Question 4 45° Figure 4 Figure 4 shows t wo particles 4 and B of mass 5 kg and 4 kg

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Chapter1: Units, Trigonometry. And Vectors
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Question 4
45°
Figure 4
Figure 4 shows two particles A and B, of mass 5 kg and 4 kg respectively.
They are connected by a light inextensible string which passes over a light
smooth pulley P. Particle A rests on a smooth plane inclined at an angle of
45 ° to the horizontal. Particle B rests on a rough horizontal plane. The
string is parallel to the line of greatest slope of the inclined plane.
a) Draw a diagram showing all the forces acting on the particles A and
В.
b) If the coefficient of friction, p, is 0.4, calculate the acceleration of
body B.
c) Find, in Newtons, the tension in the string.
d) After travelling from rest for 1.5 s, the string breaks. Calculate the
time taken for B to come to rest given that it does not reach the
pulley.
e) What is the total distance B travels?
Transcribed Image Text:Question 4 45° Figure 4 Figure 4 shows two particles A and B, of mass 5 kg and 4 kg respectively. They are connected by a light inextensible string which passes over a light smooth pulley P. Particle A rests on a smooth plane inclined at an angle of 45 ° to the horizontal. Particle B rests on a rough horizontal plane. The string is parallel to the line of greatest slope of the inclined plane. a) Draw a diagram showing all the forces acting on the particles A and В. b) If the coefficient of friction, p, is 0.4, calculate the acceleration of body B. c) Find, in Newtons, the tension in the string. d) After travelling from rest for 1.5 s, the string breaks. Calculate the time taken for B to come to rest given that it does not reach the pulley. e) What is the total distance B travels?
ion 2
5m
>B
3m-
AP
2g N
8g N
9g N
Figure 2
A uniform rod of weight 8g N rests horizontally on a pivot P, a distance x
metres from its centre. Weights A and B are resting on the rod as shown in
Figure 2.
a) Find the reaction force acting at P.
b) Calculate the distance, x, of the pivot from the centre of the rod.
Question 3
A golf ball is driven with a speed of 45 m/s at 37° to the horizontal across
horizontal grounds.
a) How high above the ground does the ball rises?
b) How long does it take the ball to land on the ground?
c) How far away from the starting point does the ball land?
Transcribed Image Text:ion 2 5m >B 3m- AP 2g N 8g N 9g N Figure 2 A uniform rod of weight 8g N rests horizontally on a pivot P, a distance x metres from its centre. Weights A and B are resting on the rod as shown in Figure 2. a) Find the reaction force acting at P. b) Calculate the distance, x, of the pivot from the centre of the rod. Question 3 A golf ball is driven with a speed of 45 m/s at 37° to the horizontal across horizontal grounds. a) How high above the ground does the ball rises? b) How long does it take the ball to land on the ground? c) How far away from the starting point does the ball land?
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