The height y and horizontal distance x covered by a projectile in a time t seconds are given by the equations
y=8t-5t^2\ \ and\ \ x=6t.y=8t−5t2 and x=6t.
If x and y are measured in metres, the velocity of projection is
Answers
Answer:
Sunita starts from her home P goes to school S via Q, R. Find the total distance travelled and displacement
respectively made by her to go from her home to school.
(1) 34 m, 26 m (2) 36 m, 24 m (3) 30 m, 20 m (4) 26 m, 34 m
6. Consider the following statements regarding translatory motion.
(a) A car moving on a straight road.
(b) A planet revolving on its axis.
(c) A shell fired from a cannon.
The correct choice is
(1) a and b (2) b only (3) a and c (4) b and c
7. A particle is moving in a circular path of radius r. The displacement after half a circle would be
(1) Zero (2) r (3) 2r (4) 2r
8. Which of the following is an example of only rectilinear motion?
(1) An aeroplane moving on a straight track with increasing speed
(2) A body in uniform circular motion
(3) Wheel rotation at uniform speed on road
(4) A body rolling down an inclined plan
Answer:
x=6t
on differentiating with respect to t
vx=6
y=8t−5t2
vy=8−5t
at t=0 vy=8
v2=62+82=102
v=10m/s