A body travels 200 cm in the first two seconds and 220 cm in the next 4 secs
A body travels 200 cm in the first two seconds and 220 cm in the next 4 secs with deceleration. The velocity of the body at the end of the 7th second is
Options […]
Motion in Straight Line
A boy standing at top of a tower of 20 m height drops a stone
A boy standing at top of a tower of 20 m height drops a stone.assuming g=10 ms⁻²,the velocity with which it hits the ground is
Options
(a) 20 m/s (b) 40 m/s (c) 5 […]
A ship A is moving westwards with a speed of 10 km/h .The time after
A ship A is moving westwards with a speed of 10 km/h .The time after which the distance between them becomes shortest, is
Options
(a) 0 h (b) 5 h (c) 5√2 h (d) […]
A missile is fired for maximum range with an initial velocity of 20 m/s
A missile is fired for maximum range with an initial velocity of 20 m/s. If g = 10 m/s², the range of the missile is
Options
(a) 40 m (b) 50 m (c) 60 […]
A particle moves a distance x in time but according to equation x=(t+5)⁻¹
A particle moves a distance x in time but according to equation x=(t+5)⁻¹.The acceleration of particle is proportional to
Options
(a) (velocity)³/² (b) (distance)² (c) (distance)⁻² (d) (velocity) ²/³
Correct Answer:
(velocity)³/²
Explanation:
No […]
A particle has initial velocity(3i⃗ +4j⃗)and has acceleration (0.4i⃗ +0.3j⃗)
A particle has initial velocity(3i⃗ +4j⃗)and has acceleration (0.4i⃗ +0.3j⃗). It’s speed after 10s is:
Options
(a) 7 units (b) 7√2 units (c) 8.5 units (d) 10 units
Correct Answer:
7√2 units
Explanation:
No […]
A bullet loses 1/20 of its velocity after penetrating a plank.How many planks
A bullet loses 1/20 of its velocity after penetrating a plank.How many planks are required to stop the bullet
Options
(a) 6 (b) 9 (c) 11 (d) 13
Correct Answer:
9
Explanation:
No explanation […]
An aeroplane flies 400m due to North and then 300m due to south and then flies
An aeroplane flies 400m due to North and then 300m due to south and then flies 1200m upwards, the net displacement is
Options
(a) greater than 1200 m (b) less than 1200 m (c) […]
A car accelerates from rest at constant rate for first 10s and covers a distance x.
A car accelerates from rest at constant rate for first 10s and covers a distance x. It covers a distance y in next 10s at the same acceleration.Which of the following is true?
Options […]
The displacement of particle is given by x=aₒ+(a₁t/2)-(a₂t²/3) what is acceleration?
The displacement of particle is given by x=aₒ+(a₁t/2)-(a₂t²/3) what is acceleration?
Options
(a) 2a₂ / 3 (b) – 2a₂ / 3 (c) a₂ (d) Zero
Correct Answer:
– 2a₂ / 3
Explanation:
No explanation […]