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Questions and answers by
Saphina AlMatary
Questions (19)
A uniform ladder of length 20.0m and weight 750 N is propped up against a smooth vertical wall with its lower end on a rough
1 answer
644 views
Determine the nature of the roots of the following quadratic equations:
(a) 3x^2 - 6x + 7 = 0 (b) 3x^2 + 6x - 7 = 0 (c) -5x^2-
2 answers
709 views
Solve the simultaneous questions:
(a) x+y+z=-3 (1) x-y-2z=13 (2) y-4z=25 (3) (b)x+2y+3z=-14 (1) 2x+3y-z=13 (2) 3x-y+2z=-7 (3)
3 answers
453 views
A ball of mass 2kg travelling in a straight line at 4ms^-1 is acted on by a force of 3N acting in the direction of motion for 5
2 answers
495 views
Solve each of these questions by factorising the left hand side into a product of linear factors:
(i) x^2 - 6x - 40 = 0 (ii) 3x^2
1 answer
539 views
A ball of mass 2kg travelling in a straight line at 4ms^-1 is acted on by a force of 3N acting in the direction of motion for 5
1 answer
526 views
Solve the simultaneous questions:
(a) x+y+z=-3 (1)(b)x+2y+3z=-14 (1) x-y-2z=13(2) 2x+3y-z=13 (2) y-4z=25 (3) 3x-y+2z=-7 (3)
1 answer
364 views
1a) Solve the each of these equations by factorising the left hand side into a product of linear factors:
(i) x^2 - 6x - 40 = 0
1 answer
654 views
Rewrite each of the following expressions as a difference of two squares by completing the square (e.g. x^2 + 4x is rewritten (x
2 answers
713 views
1a) Solve each of these questions by factorising the left hand side into a product of linear factors:
(i) x^2 - 6x - 40 = 0 (ii)
2 answers
564 views
A ball of mass 2kg travelling in a straight line at 4ms^-1 is acted on by a force of 3N acting in the direction of motion for 5
1 answer
465 views
An object of mass 12kg is pushed 34m up a frictionless slope that is at an angle of 56^o to the horizon.
Determine both (a) the
1 answer
464 views
An object of mass 12kg is pushed 34m up a frictionless slope that is at an angle of 56^o to the horizon.
Determine both (a) the
1 answer
442 views
A vehicle of mass 600kg, moving at a speed of 30ms^-1 collides with a stationary vehicle of mass 900kg. The two vehicles lock
1 answer
885 views
A ball of mass 1.5kg is struck by a bat in the opposite direction to the motion of the ball. Before the impulse the ball is
1 answer
787 views
A ball of mass 2kg travelling in a straight line at 4ms^-1 is acted on by a force of 3N acting in the direction of motion for 5
0 answers
413 views
onsider the following velocity time graph:
(I sent a separate link of the picture as it wouldnt allow me to send it in this box)
0 answers
471 views
A car of mass 1000kg is travelling along a straight flat road at a constant speed of 30.0ms^-1. It then accelerates with
0 answers
953 views
A cricket ball is thrown at a speed of 30ms^-1 in a direction 30 degrees above the horizontal. Calculate:
1. The maximum height.
1 answer
828 views
Answers (3)
I would assume g as being 10ms^-2 therefore for the maximum height, I got: h = 1/2g (v sinθ)^2 =0.5×10^-2(30sin(30))^2 =1.125 Is this correct? How would I do the other two please?
I don't understand any of this because I don't get how you would substitute the values into the equation?
for a I got: 30.0×10.0+0.5×(3.00+10.0)^2=384.5 so the final speed is 384.5 m s??? From b to d its extremely difficult to make an equation for! Please help me asap, Kind Regards
