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# Mechanics Questions watch

1. Q. A box has mass 26kg. It is placed on a horizontal surface. Calculate the magnitude of the normal reaction force acting on the box.

Q. A car is travelling at constant speed on a straight horizontal line. The car experiences a resistance force of magnitude 600N. State the magnitude of the forward driving force acting on the car.

Q. A sphere, which has mass 20kg, is attached to an elastic string. The sphere is in contact with a horizontal surface, with the elastic string vertical. The tension in the string is 20N.
a) Calculate the weight of the sphere
b)Find the normal reaction force acting on the sphere,

Q. A sack, which has weight 200N, is supported in equilibrium by two ropes. The ropes are both at an angle of 30 degrees to the vertical.
a) Show that the tension in each rope is the same
b)Find the tension in the ropes

Q. A particle has weight 500N. The particle is supported by two ropes, which make angles of 40 and 30 degrees to the vertical. Fid the tension in each rope.
2. A box has mass 26kg. It is placed on a horizontal surface. Calculate the magnitude of the normal reaction force acting on the box.
26g N

A car is travelling at constant speed on a straight horizontal line. The car experiences a resistance force of magnitude 600N. State the magnitude of the forward driving force acting on the car.
Travelling at constant speed, therefore forces are balanced. Driving force = Frictions

A sphere, which has mass 20kg, is attached to an elastic string. The sphere is in contact with a horizontal surface, with the elastic string vertical. The tension in the string is 20N.
a) Calculate the weight of the sphere
b)Find the normal reaction force acting on the sphere,
a) 20g
b)20g - 20 N

Q. A sack, which has weight 200N, is supported in equilibrium by two ropes. The ropes are both at an angle of 30 degrees to the vertical.
a) Show that the tension in each rope is the same
b)Find the tension in the ropes
b) Tcos30 = 100, T = 200/rt3

A particle has weight 500N. The particle is supported by two ropes, which make angles of 40 and 30 degrees to the vertical. Fid the tension in each rope.
T sin40 = K sin30
T = Ksin40/sin30
Tsin40 + Ksin30 = 500
T(sin40 + sin(^2)30/sin40) = 500
T = 485N
K = 623 N
Perhaps...
3. thanks for the help...............

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