C1 Forces and Motion II

Diagram shows a boy is pulling a 50 kg box along a rough floor.

Which combination of forces F₁ and F₂ will produce an acceleration of 2 m s^-2?

• F1 : 100N F2 : 200N

• F1 : 200N F2 : 400N

• F1 : 300N F2 : 600N

• F1 : 400N F2 : 800N

A constant force of 20 N acts on a block placed on a rough surface as shown in Diagram.

If the friction is 5 N, the block will move with

• constant velocity

• constant acceleration

• increasing acceleration

• decreasing acceleration

Diagram shows Jamal drives a bike at a constant speed of 25 ms^-1. The two forces resisting motion are air friction of 30 N and frictional force of 80 N.

Determine the thrust force of the engine.

• 50 N

• 55 N

• 85 N

• 110 N

Which of the following produces the largest acceleration when forces are applied on a block?

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The diagram shows the forces acting on a picture, of weight W, suspended by a cord.

The tension in the cord is T. Which of the following expressions shows the correct relationship between W and T?

• $W=2T\cos\theta$

• $W=T\cos\theta$

• $W=T\sin\theta$

• $W=2T\sin\theta$

A box of weight 150 N is placed on an inclined plane. The component of the box’s weight acting along the plane is given by W'. What would be the value of W', in Newtons?

• $\frac{150}{\cos15\degree}$

• $150\times\cos15\degree$

• $\frac{150}{\sin15\degree}$

• $150\times\sin15\degree$

Tags

NGSS.HS-PS2-1

The diagram above is a free-body force diagram for a hot air balloon when a wind is blowing. The size of the resultant force acting on the balloon is

• 400 N

• 500 N

• 700 N

• 9, 805 N

The ropes are symmetrically attached to ceiling . Find the tension of the rope. Assuming both string has the same magnitude forces.

• 6.00 N

• 3.00 N

• 3.67 N

• 4.67 N

Find the tension on inclined rope.

• 12.67 N

• 18.67 N

• 15.67 N