For which set of angles, Range of projectile will be equal:?
40, 50
30, 60
45, 60
Both (a) and (b)
(PPSC Male Test 2022) A free falling ball having mass 10 g moving with 8 m/s hits ground and rebounds with 6 m/s. Find the magnitude of change in momentum?
140 Ns
0.14 Ns
0.02 Ns
None of these
A certain force gives an acceleration of 5 m/s2 to a body of mass 2 kg. the same force would give a 20 kg object an acceleration of:?
5 m/s2
10 m/s2
200 m/s2
None of these
Which of the following is correct?
Inertia have the same dimension as that of force
Inertia have the same dimension as that of ratio of work done to velocity
Inertia have the same dimension as that of K.E.
None of these
The dimension of Range of projectile is?
[L]
1/[L]
Dimensionless
None of these
As a rocket moves upward, its acceleration?
Increases
Decreases
Remains Same
None of these
While standing on top floor of 196 m tall building, your cell phone falls from your hand. A person on the ground sees this. If he is standing exactly at the place of cell phone fall, determine the approx. time that the cell phone will take to reach hand?
Between 6.4 and 6.8 seconds
Between 6.0 and 6.4 seconds
Between 5.5 and 6.0 seconds
None of these
A football is kicked with an angle θ w.r.t horizontal, the acceleration of projectile at highest point is:?
Zero
same as that of velocity
9.8 ms^-2 , direction downwards
9.8 ms^-2 , direction upwards
When the body is moving with constant acceleration then instantaneous acceleration is equal to?
Instantaneous velocity
Average velocity
Average acceleration
None of these
Which of the following statements relating to Newton’s third law is not correct?
The two forces are equal and opposite so the bodies are in equilibrium.
The two forces must act on different bodies.
The two forces are opposite in direction.
None of these
A man is in a car is moving with velocity of 36 Km/hr. his speed with respect to the car is.?
10 m/s
36 m/s
Zero
None of these
The collision between two bodies be elastic if bodies are?
Solid and hard
Soft and elastic
Soft and hard
solid and elastic
What is the shape of velocity time graph for constant acceleration?
straight line inclined in xy plane
straight line parallel to x axis
parabola
None of these
What is the shape of position time graph for zero velocity?
straight line inclined in xy plane
straight line parallel to x axis
parabola
None of these
A book is lying on the table, how many forces are acting on it?
1
2
Infinite
None of these
[PPSC 2020] A truck of mass 750 kg moving at 360 km/h hits a stationary dumpster of mass 1250 kg. The two vehicles stick and move together after the collision. What is their common speed??
150 m/s
75 m/s
60 m/s
None of these
If the driver in the bus, you are travelling in, suddenly accelerates,?
You are thrown forward
You are pushed backward
You remain where you are
None of these
[PPSC 2022] A man sitting inside an open vehicle and moving uniformly on a straight path throws a stone vertically upward, what will happen?
Comes back to his hand
Falls behind him
Ball will escape the gravity of earth and becomes a satellite 😮
None of these
When we jump out of the boat standing in still water, the boat moves?
Forward
Backward
Sideways
None of these
If sqrt(x) = t + 7, then?
velocity of the particle is inversely proportional to t
velocity of the particle is proportional to t^2
the particle moves with constant acceleration
None of these
