Physics Past Questions and Answers

Question 4711:

A car travels with a constant velocity of $45km/h$ for $10s$.
What is the distance it covers in this time?

A. $450m$
B. $400m$
C. $125m$
D. $45m$

Question 4712:

A body is projected vertically upwards with a velocity of $9.78m/s$.
How high does it travel before it comes to rest momentarily at the top of its motion?

A. $4.89m$
B. $500m$
C. $48m$
D. $9.78m$

Question 4713:

Which of the following statements is not true about the friction force?

A. Friction always aet in such a direction that opposes motion
B. The limiting frictional force is dependent on the area of contact of the two surfaces
C. Until motion takes place, the frictionally force is always equal to the fore tending to produce the motion
D. When motion takes place, the friction force is less than its limiting value.

Question 4714:

A solid of mass $1kg$ suspended by a string, is completely immersed in water. If the tension in the string is $5N$.
calculate the upthrust on the solid Take $g=9.78m/s2$

A. $8.0N$
B. $4.78N$
C. $47N$
D. $9.78N$

Question 4715:

The resistance of a piece of wire of length $20m$, cross-sectional area $8.0\times 10-6m2$ and resistivity 4.0x10-7. [a-m is:

A. $0.5$
B. 1.0
C. 5.0
D. 10.0