Relative Acceleration
Trending Questions
The instantaneous displacement of a simple pendulum oscillator is given by x=Acos (wt+π/4). It's speed will be maximum at time
Two cars A and B are traveling in the same direction with velocities v1 and v2 (v1 > v2) When the car A is at a distance d ahead of the car B, the driver of the car A applied the brake producing a uniform retardation a. There will be no collision when

Both will reach at same time and same place.

The first ball will reach later than the second ball at same place.

The second ball will reach later than the first ball at different place.
 Same time but different places.
 10 s
 20 s
 30 s
 40 s
 4 m
 2 m
 5 m
 1 m
At the instant the traffic light turns green, an automobile starts with a constant acceleration, a=10m/s2. At the same instant a truck, travelling with a constant speed of 5 m/s, overtakes and passes the automobile. (a) How far beyond the traffic signal will the automobile overtake the truck? (b) How fast will the automobile be at that instant?
10m, 15 m/s
5m, 10 m/s
10m, 10 m/s
5m, 15 m/s
 1 m/s2
 1 cm/s2
 0.1 m/s2
 0.01 cm/s2
Statement (1) : A second's pendulum has a time period of 1 second.
Statement (2) : It takes precisely one second to move between the two extreme positions.
In the light of the above statements, choose the correct answer from the options given below.
 Both statement 1 and statement 2 are false.
 Statement 1 is true, but statement 2 is false.
 Statement 1 is false, but statement 2 is true.
 Both statement 1 and statement 2 are true.
 ug+a
 ug−a
 2ug+a
 2ug−a
Derive an expression for time period of simple pendulum ( for 5marks question)
A healthy young man stand at a distance of $7m$ from a $11.8m$height building sees a kid slipping from the top floor. With what speed (assume uniform) should he run to catch the kid at the arm s height at $1.8m$
(Take g=10 m/s2)
 4
 6
 12
 8
 1 m/s2
 1 cm/s2
 0.1 m/s2
 0.01 cm/s2
 1 sec
 1.33 sec
 2 sec
 1.66 sec
A body is thrown vertically upwards. Which one of the following graphs correctly represents the velocity vs time?
Car A is moving with a speed of 36 km/h on a twolane road. Two cars B and C, each moving with a speed of 54 km/h in opposite directions on the other lane are approaching car A. At a certain instant when the distance AB = distance AC = 1 km, the driver of car B decides to overtake A before C does. What must be the minimum acceleration of car B so as to avoid an accident?
1 ms−2
2 ms−2
3 ms−2
4 ms−2
The speedometer of your car shows that you are travelling at a constant speed of $40{\text{ms}}^{1}$. Is it possible that your car accelerating?
Two trains simultaneously left points $M$ and $N$ and headed towards each other.
The distance between point $M$ and point $N$ is $380$ mi.
The speed of the train, which started, from point $N$ was $5$mph faster than the speed of the other train.
In two hours after the departure the distance between the trains was $30$ mi.
What is the speed of each train?
Two particles A and B are thrown vertically upward with velocity, 5 m/s and 10 m/s respectively (g=10m/s2). Find separation between them after one second. (Use relative motion approach)
0 m
5 m
10 m
15 m
 4 s
 3 s
 2 s
 1 s
 0.6s
 0.4s
 1s
 1.2s
 g√t1t22
 g(t1+t2)2
 g√t1t2
 gt1t2t1+t2
 Results are precise, but not accurate
 Results are accurate, but not precise
 Results are both precise and accurate
 Results are neither precise not accurate
I want to play a prank on my friend and turn his world upside down, at what acceleration must his lift move to make it seem that the world is upside down to him
g downwards
2g downwards
2g upwards
g upwards
(a) increases proportionately with temperature
(b) increases
(c) decreases
(d) remains constant