A car is moving at a speed of 30 m/s on a horizontal circular track of radius of 300 m. This speed is increasing at a rate of 4 . Total acceleration of the car is:
(1) 5
(2) 7
(3) 1
(4) 3
A particle is moving along a circular path of radius a with constant angular velocity . The magnitude of displacement of the particle as a function of time t is:
1.
2.
3.
4.
A projectile starts with speed u at an angle from the horizontal ground. The average velocity of the projectile between the point of projection and the point of arrival on the ground is:
(1) usin
(2) 2usin
(3) ucos
(4) 2ucos
A projectile is thrown with speed 50 m/s at an angle 53° with the horizontal. Taking horizontal as x-axis and vertical as y-axis, the equation of trajectory of the projectile is
(1) 180y = 140x -
(2) 180y = 240x -
(3) 180y = 90x - 2
(4) 180y = 80x - 3
Time of flight of a body dropped from a height H is T. If another body is projected horizontally with speed v from the same height, then its time of flight will be:
1. T
2.
3.
4.
The vertical component of the velocity of a projectile from the ground is 40 m/s and its velocity at the highest point is 30 m/s. The horizontal range of the projectile is:
(1) 120 m
(2) 1200 m
(3) 240 m
(4) 2400 m
Two particles are thrown for same horizontal range R with the same initial speed (u), however, their times of flight are respectively. Which of the following is correct if maximum heights attained by them are respectively?
1.
2.
3.
4. All of these
In the given diagram shown for a projectile, what is the angle of projection?
1.
2.
3.
4.
A body is executing uniform circular motion in a circle of radius 100 m at speed 10 m/s. Acceleration of the body is :
(1) Zero
(2) 2
(3) 1
(4) 5
A particle started revolving from rest with a constant angular acceleration in a circular path of radius r. If centripetal acceleration becomes numerically equal to tangential acceleration at time t, then t is equal to:
1.
2.
3.
4.