Uniformly accelerated motion for grade 11 from the scratch

If they and y coordinates of a particle at any time t is given by x=7t+4t'² and y=5t. What is the acceleration of the particle at t=5sec.

• Zero

• 8m/s2

• 20m/s²

• 40m/s2

• 5m/s2

The rate of change of velocity per time is called........

• Speed

• Velocity

• average speed

• acceleration

• none

For a uniformly accelerated motion the graph of displacement versus time would be

• a horizontal straight line

• a straight line with negative slope

• a straight line with positive slope

• Curved line

• none of the above

A uniformly moving train covered a 24km distance in 10 minutes. How far can it travel with 1hr and 30minutes?

• 144km

• 145.5km

• 226km

• 375

• 112km

A body whose velocity is constant along straight line

• has a positive acceleration

• has a negative acceleration

• has zero acceleration

• might have any of the above accelerations

• none

A body whose velocity is constant along straight line

• has a positive acceleration

• has a negative acceleration

• has zero acceleration

• might have any of the above accelerations

• none

A body with an initial speed of 1m/s accelerates uniformly along a straight line at 2m/s^{2. What distance does it cover in the third second?}

• 4m

• 12m

• 8m

• 6m

• 10m

An object is thrown down with initial speed of 12m/s from a 20m high building. If the y axis iscchosen to point upward,which of the following describe how the height of the object varies with time

• Y=20-12t-1/2gt²

• Y=20+12t-1/2gt²

• Y-20-12t+1/2gt²

• Y=20+12t+1/2gt2

• Y=20+1/2gt2

For the body with 10kg changes it's velocity from 4m/s to 7m/s in 1second .The. acceleration of the body is....

• 3m/s²

• 2m/s²

• 4m/s²

• 1m/s²

• 5.5m/s²

From question number 9;the weight of the body will be...(take g=10m/s²⁾

• 2N

• 1N

• 10N

• 9.8N

• 5N