Question

Q1..A ball of mass 100g is thrown with a velocity of 10m/s at an angle of 60 with the horizontal. the velocity of the ball at the highest point of trajectory is
a). 10m/s
b). 5m/s
c). 20m/s
d). 0
Q2.A body of mass 50g is moving with a constant velocity of 5m/s on a horizontal smooth surface.the force acting on the body is.
a). 1N
b). 2N
c). 5N
d). 0​

Answer 1

Answer:

1.b

2.d

Explanation:

1.at highest point vertical component of velocity is zero

only horizontal component present

so v=ucos theta

2.object is moving with constant velocity means net force is 0