A 5.0kg trolley is initially moving at 3.5m/s West. A 12.4N force (East) acts on it for 3.5s. Take 'travelling East' as being positive, and 'travelling West' as being negative. Calculate the acceleration.

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

i guess it’s a and b

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas