1
COMEDK 2024 Morning Shift
+1
-0

When two objects are moving along a straight line in the same direction, the distance between them increases by $$6 \mathrm{~m}$$ in one second. If the objects move with their constant speed towards each other the distance decreases by $$8 \mathrm{~m}$$ in one second, then the speed of the objects are :

A
$$14 \mathrm{~ms}^{-1}$$ and $$2 \mathrm{~ms}^{-1}$$
B
$$7 \mathrm{~ms}^{-1}$$ and $$1 \mathrm{~ms}^{-1}$$
C
$$3.5 \mathrm{~ms}^{-1}$$ and $$2 \mathrm{~ms}^{-1}$$
D
$$3.5 \mathrm{~ms}^{-1}$$ and $$1 \mathrm{~ms}^{-1}$$
2
COMEDK 2023 Morning Shift
+1
-0

A body is projected vertically upwards. The times corresponding to height $$h$$ while ascending and while descending are $$t_1$$ and $$t_2$$, respectively. Then, the velocity of projection will be (take, $$g$$ as acceleration due to gravity)

A
$$\frac{g \sqrt{t_1 t_2}}{2}$$
B
$$\frac{g\left(t_1+t_2\right)}{2}$$
C
$$g \sqrt{t_1 t_2}$$
D
$$g \frac{t_1 t_2}{\left(t_1+t_2\right)}$$
3
COMEDK 2023 Morning Shift
+1
-0

A car starts from rest and accelerates uniformly to a speed of $$180 \mathrm{~kmh}^{-1}$$ in $$10 \mathrm{~s}$$. The distance covered by the car in this time interval is

A
500 m
B
250 m
C
100 m
D
200 m
4
COMEDK 2023 Morning Shift
+1
-0

A ball is projected horizontally with a velocity of $$5 \mathrm{~ms}^{-1}$$ from the top of a building $$19.6 \mathrm{~m}$$ high. How long will the ball take to hit the ground?

A
$$\sqrt{2} \mathrm{~s}$$
B
$$2 \mathrm{~s}$$
C
$$\sqrt{3} \mathrm{~s}$$
D
$$3 \mathrm{~s}$$
EXAM MAP
Medical
NEET