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Tests
Name:
Forces 1
Created By:
V. Gokal
Max Time:
5 mins
Select an option for each question and click Submit
1. A box, mass m, is at rest on a rough, horizontal surface. A force of constant magnitude F is then applied on the box at an angle of 60° to the horizontal as shown in the sketch.
Fcos 60° – ma, in the direction of R.
Fcos 60° – ma, in the direction of Q
Fsin 60° – ma, in the direction of R
Fsin 60° – ma, in the direction of Q
2. A body slides down a frictionless, inclined plane of constant gradient. For which one of the combinations given below, will both physical quantities experience a constant increase in magnitude?
acceleration, velocity
momentum, kinetic energy
velocity, momentum
acceleration, displacement
3. A woman pushes a trolley in a supermarket with a horizontal force of 80N. During the motion, the frictional force on the trolley is 60N.
20N
60N
80N
140N
4. The physical quantity represented by the expression below is equivalent to …
resultant force
momentum
energy
change in momentum
5. A body of mass m moves at constant velocity v through a displacement s against a constant, frictional force F. What is the power required to keep the body moving at this constant velocity?
1
/
2
Fs
Fv
1
/
2
mv
2
0
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