Q.1
##### A man is standing on a weigh scale in an elevator. When the elevator is accelerating upward with constant acceleration a, the scale reads 867.0 N. When the elevator is accelerating downwards with the same constant acceleration a, the scale reads 604.5 N. Determine the magnitude of the acceleration a and the mass of the man?
• 1.15 m/s2 ,75 kg
• 1.25 m/s2,95 kg
• 1.75 m/s2,85 kg
• 1.75 m/s2,75 kg
Q.2
##### A canon fires ball at an angles 400.The ball would have landed at the same place if it were fired at any angle
• 30 °
• 50°
• 90°
• None of these
Q.3
• a
• 4a
• 16a
• 2a
Q.4
##### A particle initially located at the origin has an acceleration of a=.3j m/s2 and an initial velocity of v=.5i m/s. Find the vector position and velocity at time t=2 sec?
• (.5i+6j),(i+.6j)
• (i+.1j),(.5i+6j)
• (i+.6j),(.5i+6j)
• None of these
Q.5
##### Which one of the following equations is NOT dimensionally correct? Following things are given v => is a speed (L/T) a => is an acceleration (L/T2) x => is a distance (L) t => is a time (T)
• $x=at^2$
• $v=v_0+ax$
• $v^2=2ax$
• $v=at$
Q.6
##### Scalar product of two vector P and Q is zero.?
• P and Q are parallel
• either P = 0 or Q = 0
• P is perpendicular to Q
• either P = 0 or Q = 0 or P is perpendicular to Q
Q.7
##### We knew that pushing heavy furniture across the carpet usually takes more force to get it moving than it takes to keep it moving. This is because
• the coefficient of static friction is greater than the coefficient of kinetic friction.
• It is due to law of inertia
• the coefficient of kinetic friction is greater than the coefficient of static friction
• None of these
Q.8
##### Ram drives from Rampur to hapur. Even without knowing anything about the roads between these two cities we can say with certainty that the magnitude of the Ram displacement from rampur when he reaches hapur is?
• always less than the total distance Ram traveled.
• always equal to the total distance ram traveled
• less than or equal to the total distance he traveled
• cannot be determined
Q.9
##### Lets take the motion of the particle along x axis .Let the particle move in the positive direction, the slope of the velocity verses time graph will be negative when?
• velocity decreases with time
• velocity increases with time.
• the acceleration increases with time
• the acceleration decreases with time
Q.10
##### A object is accelerated by the constant force F.Suddenly after some time, it is acted by a second force F with opposite direction to first force. With two force acting on it,the object ?
• it will come to halt in some time
• it comes to halt immediately
• continues with the same velocity which it has when second force start acting
• none of the above
Q.11
##### Two hot wheels toy cars A and B are released simultaneously on an inclined plane which is at an angle of 40° to the horizontal. A has a mass of m kg and the B a mass of 2 m kg. We assumed that friction and air drag are absent. which statement best describes the magnitudes of their accelerations after being released.?
• Both hot wheels cars accelerate at a rate of gsin50°
• Both hot wheels cars accelerate at a rate of g cos40°
• Car B acceleration is 8 times greater than the car A
• None of the above
Q.12
##### A small car had a head-on collision with bigger truck. Which will have maximum change in velocity
• Truck
• car
• Both same
• Insufficient information
Q.13
##### A car accelerates on the road. Viewed from outside the car,what is the force that accelerates it?
• the wheel are pushing the car.
• Engine is pulling it forward
• Gravitational force
• The road pushes the car forward
Q.14
##### Two ball A and B are at the same height . Ball A is dropped while ball B is fired horizontally at same time. Which statement does not the describe the motion?
• The ball B has a larger net velocity when it hits the ground
• Both ball A and B hit the ground at the same time
• The ball B has greater vertical velocity than A when it hits the ground
• The ball A is having null horizontal velocity
Q.15
##### An astronaut on planet A kicks a bowling ball and hurts his foot.A year later, the same astronaut kicks a bowling ball on the planet B with the same force. It is given gravitational pull of planet A is more than planet B?
• His foot will be hurt as same on planet B as planet A
• His foot will be hurt less on planet B as planet A
• His foot will be hurt greater on planet B as planet A
• insufficient information
Q.16
##### A person is attracted toward the earth by the force F, The force with which person attract the earth is ?
• slighting greater than F
• slighting lower than F
• F
• very very small
Q.17
##### A truck is traveling over the crest of a small semi-circular hill of Diameter D = 1600 m. How fast would it have to be traveling for it to leave the ground? Take g=10 m/s2
• 85.46 m/s
• 89.45 m/s
• 90 m/s
• none of these
Q.18
##### A carpenter hits a nail with a hammer.which of the following is true for collision between nail and hammer?
• There is a force on hammer only
• There is force on hammer and nail both
• There is force on nail only
• Insufficient information
Q.19
##### Which one of the following equations is dimensionally correct? Following things are given v => is a speed (L/T) a => is an acceleration (L/T2) x => is a distance (L) t => is a time (T) M => is a Mass (M) F => is a force (ML/T2) p => is a momentum ( ML/T)
• $p=mv-Ft$
• $p^2=\frac {F}{M}$
• $v^2=2ax+ut$
• $v=at+ \frac {F}{m}$
Q.20
##### A plane traveling horizontally to the right at 100 m/s flies past a helicopter that is going straight up at 20 m/s. From the helicopter's perspective, the plane's direction and speed are?
• Right and down, 100 m/s
• Right and down, more than 100 m/s
• Right and down, less than 100 m/s
• none of these