Acceleration of an object is equal to
speed / time
velocity / time
change in velocity / time
change in speed/ time
An electron moving with a velocity of 5 x 104 ms-1 enters into a uniform electric field and acquires a uniform acceleration of 104 m/s2 in the direction of its initial motion.Calculate the time in which the electron would acquire a velocity double of its initial velocity.
10 s
5 s
7 s
15 s
Rate of change of velocity is _________ .
Velocity
Acceleration
Speed
Displacement
The boy starts from rest and reaches 40 m/s in l0 sec what is its acceleration.
6 m/s2
4 m/s2
8 m/s2
2 m/s2
A car starting from rest acquires a speed 25 m/s in 10 sec after which it maintains this speed for 10 s .Find acceleration .
2.5 m/s2
1 m/s2
1.5 m/s 2
A car reduced its speed from 90 km/h to 40 km / h in 10 sec What is the acceleration of the body .
-5 m/s2
5 m/s2
1.389 m/s2
-1.389 m/s2
What is the SI unit of acceleration ?
km/h2
m/s2
m/h2
km/s2
A bus starting from rest moves with a uniform acceleration of 0.1 m/s2 for 2 minutes.Find the speed acquired and the distance travelled.
12 m/s, 720 m
14 m/s,620 m
12 m/s,700 m
10 m/s,720 m
A car travelling at a speed 54 km/hr is brought to rest in 90 s .Find the retardation and distance travelled by the car before coming to rest .
0.16 m/s2 , 675 m
0.4 m/s2 , 600 m
2 m/s2 , 500 m
None of these
In the equation s = ut + 1/2 at2 what does s represent .
distance
speed
velocity
Acceleration.
